A. | was invented | B. | invented | C. | has invented |
分析 青蒿素是中國偉大科學家屠呦呦發(fā)明的.
解答 答案:A
結合語境可知屠呦呦發(fā)明青蒿素描述的是過去發(fā)生的事情故確定時態(tài)為一般過去時,主語Artemisinin是謂語動詞invent的承受者,二者為被動關系所以用被動語態(tài),故該空處為一般過去時的被動語態(tài),其結構為:主語+was/were+及物動詞的過去分詞,主語 Artemisinin是單數(shù)名詞,be動詞用was,invent的過去分詞是invented,套用結構,故選A
點評 本題考查時態(tài)和語態(tài).每個時態(tài)都有標志詞,熟記這些標志詞是做題的關鍵.在沒有時間狀語的情況下可以根據(jù)語境來對時態(tài)做出判斷.判斷語態(tài)的關鍵則是觀察主語是謂語動詞的執(zhí)行者還是承受者,二者結合套用結構即可選出正確答案.
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