【題目】 If the new safety system _______ to use, the accident would never have happened.
A.had been put
B.were put
C.should be put
D.would be put

【答案】A
【解析】如果新的安全系統(tǒng)被投入使用，這個(gè)事故本就不會(huì)發(fā)生．根據(jù)句意可知，考查虛擬語(yǔ)氣．跟故去事實(shí)相反，從句用had done，主句用would have done，再結(jié)合new safety system 是被投入使用，故用had been done，即答案為A．

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】It suddenly occurred to him ____ he had left his keys in the office.
A.that
B.what
C.where
D.which

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】Your performance in study largely depends on the attitude you hold study.
A.at
B.by
C.with
D.to

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.
A.why
B.where
C.how
D.when

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】The national park has a large collection of wildlife, _________ from butterflies to elephants.
A.ranging
B.range
C.to range
D.ranged

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】The door and the windows were all closed and there was no _______ of forced entry.

A. sigh B. signal

C. sign D. sight

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】她一旦下定了決心,什么也不能使她改變。
Once , nothing can change it.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】The insect's black eyes, are fixed on the cabbage, show the creature's interest in the vegetable.
A.which
B.as
C.that
D.what

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

【題目】_______ the global economy is showing signs of recovery, many developing countries are still suffering.

A. While B. Where

C. How D. As

查看答案和解析>>

同步練習(xí)冊(cè)答案