【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】

試題分析：考查語態(tài)。句意：---最近許多藥物都已經(jīng)被禁用了。----真的。但是科學家們說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的動作承受者，studies是need的動作承受者，應該用被動語態(tài)。根據(jù)題意可知選A項。

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