14．The mats and the attached earth were lifted using the freezing technology，before        to our lab for further analysis．（　　）
A．transportingB．being transported
C．to be transportedD．transported

分析 使用凍結(jié)技術(shù)，墊子和附在上面的泥土在被運送到實驗室作進一步分析之前被抬起．

解答 答案：B 考查動名詞的被動式．此處before是介詞，后接動詞時用動名詞形式，排除C、D項，且主語The mats and the attached earth與transport之間是動賓關(guān)系，要用動名詞的被動式，排除A項，只有B項正確．

點評 非謂語動詞作狀語．它的邏輯主語就是句子的主語．因此關(guān)鍵看它和句子主語之間的關(guān)系．如果是和句子主語之間構(gòu)成主動關(guān)系，使用現(xiàn)在分詞，若構(gòu)成被動關(guān)系，使用過去分詞．若表目的，使用不定式．

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：閱讀理解

4．Snowiest Destinations：Greenland
This frosty getaway is a wonderland like no other．Have you heard the tale that Viking explorers named Iceland and Greenland in order to discourage others from the former so they could keep the discovery of a relatively temperate land-the Iceland-to themselves？Whether the legend is true or not，the difference in climate is-while Iceland offers many wintry activities，Greenland is the place for true ice-and-snow adventures，like a three-day，160-kn，Arctic Circle Race for skiers；hunting by dog sledge；ice fishing in a bay；or a camping trip to the Greenland ice cap，the word's second-largest body of ice．
Snowiest Destinations：Siberia
Even to Canadians，a snowy destination like Russia creates images of endless winter and deep snows．Visit the Russia House tourist centre near Novosibirsk in Siberia to experience a classic Russian winter．Stay in wooden houses，take troika （horse carriage） rides，enjoy traditional Russian cuisine and experience the ban-ya，the Russian-style sauna，complete with a dunk in an ice hole to refresh the senses．
Snowiest Destinations：Sapporo
This wintertime haven calls itself"blessed by snow"and it's no wonder-with an average annual snowfall of 630cm （248 inches），you'd have to find a way to love it．Visit during the February Snow Festival to view snow and ice sculptures and play snow games；the city's White Illumination（照明）brightens dark winter nights with an artistic light display around such themes as Christmas and the starry skies．
 
21．Why did the Viking explorers named Iceland according to the tale？C
A．Because Iceland is really full of ice and snow．
B．Because Iceland is really full of green plants．
C．Because Vikings wanted to make it a secret．
D．Because Vikings discovered it secretly．
22．Where will true ice-and-snow adventurers choose to go？B
A．Iceland．B．Greenland．C．Siberia．D．Sapporo．
23．Where can travelers experience typical Russian winter activities？C
A．Iceland．B．Whistler．C．Siberia．D．Sapporo．
24．Why does Sapporo call itself"blessed by snow"？A
A．It has a large snowfall．
B．Snow blesses Sapporo．
C．God blesses this place．
D．Everyone will love it．

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

5．The author couldn't _________it _________，so I can't make out what the article says．（　�。�
A．get； acrossB．get； overC．give； awayD．give； out

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

2．You are allowed to get access to our computer system              you get the manager's permission．（　�。�
A．if onlyB．unlessC．even ifD．only if

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

9．Metro Pocket Guide
Metrorail （地鐵）
Each passenger needs a farecard to enter and go out．Up to two children under age five may travel free with a paying customer．
Farecard machines are in every station．Bring small bills because there are no change machines in the stations and farecard machines only provide up to $5 in change．
Get one ticket of unlimited Metrorall rides with a One Day Pass．Buy it from a farecard machine in Metro stations．Use it after 9：30 a．m．until closing on weekdays，and all day on weekends and holidays．
Hours of service
Open：5 a．m．Mon．-Fri.7 a．m．Sat．-Sun．
Close：midnight Sun．-Thur.3 a．m．Fri．-Sat．nights
Last train times vary．To avoid missing the last train，please check the last train times posted  in stations．
Metrobus
When paying with exact charge，the fare is $1.35．When paying with a SmarTrip?card，the fare is 1.25．
Fares for senior/disabled customers
Senior citizens 65 and older and disabled customers may ride for half the regular fare．On Metrorail and Metrobus，use a senior/disabled farecard or Smar/Trip?card．For more information about buying senior/disabled farecard，SmarTrip?cards and
 passes，please visit MetroOpensDoors．com or call 202-637-7000 and 202-637-8000．
Senior citizens and disabled customers can get free guide on how to use proper Metrobus and Metrorail services by calling 202-962-1100．
Travel tips （提示）
．Avoid riding during weekday rush periods-before 9：30 a．m．a(chǎn)nd between 4 and 6 p．m．
．If you lose something on a bus or train or in a station，please call Lost &Found at 202-962-1195．

1．What should you know about farecard machines？D
A．They start selling tickets at 9：30a．m．
B．They are connected to change machines．
C．They offer special service to the elderly．
D．They make change for no more than $5．
2．At what time does Metrorail stop service on Saturday？B
A．At midnight．B．At 3a．m．C．At 5a．m．D．At 7a．m．
3．What is good about a SmarTrip?card？B
A．It is convenient for old people．
B．It saves money for its users．
C．It can be bought at any time．
D．It is sold on the Internet．
4．Which number should you call if you lose something on the Metro？A
A.202-962-1195
B.202-962-1100
C.202-637-7000
D.202-637-8000．

查看答案和解析>>

科目：高中英語 來源： 題型：填空題

19．Thousands of us struggle with letting go of the pain that was（61）caused（cause） by past events and circumstances．Let's face it：none of us is perfect and we all may speak of something（62）thatcould hurt someone else in the process．You can't change（63）thepast．What you can do though is realizing that we are all humans who make mistakes and then（64）immediately（immediate） make a decision and choose to let go of the wounds．
Firstly，you need to accept（65）whathas happened since you can't change it．Life always （66）tries（try） to teach us new lessons and you need to be alert，study and analyze them．Secondly，make a firm decision to forgive．One of the best blessings is the（67）choice（choose） to make．You can't go from point A to point B unless you first choose to do it．Lastly，realize that holding on（68）tothe hurtful emotions will only hurt one person-YOU．Therefore，since you love and value（69）yourself（you），you need to look after yourself．Begin to focus on the idea that we are all humans and could easily make mistakes from time to time．Focus on the"goodness"that is in each of us．This type of focus and self-talk makes it easier（70）to let（let） go of past hurt and move on．

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

6．In order for our goals _______in the near future，every one of us should do our bit．（　　）
A．to achieverB．to be achievedC．being achievedD．achieved

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

3．The police ___ an organization which protects the public from harm．（　�。�
A．isB．areC．wasD．were

查看答案和解析>>

科目：高中英語 來源： 題型：詞匯應(yīng)用

9．She tried to sleep，but thoughtscrowded （涌上）in and images flashed into her mind．

查看答案和解析>>

同步練習(xí)冊答案