【題目】— Many drugs have been forbidden recently.
— Actually. But the scientists say that before a new drug ___ on humans, plenty of studies ______.
A.can be tested; are needed
B.can test; are needed
C.can be tested; need
D.can test; need

【答案】A
【解析】句意：—最近許多藥物都已經(jīng)被禁用了。—真的。但是科學(xué)家們說(shuō)一種新藥能夠在人的身上試用之前，需要大量的研究。根據(jù)drug是test的動(dòng)作承受者，studies是need的動(dòng)作承受者，應(yīng)該用被動(dòng)語(yǔ)態(tài)。根據(jù)題意可知選A項(xiàng)。

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