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Scientists say it may be five or six years______this medicine is tested on human
Scientists say it may be five or six years______this medicine is tested on human
游客
2025-02-28
30
管理
问题
Scientists say it may be five or six years______this medicine is tested on human beings.
选项
A、since
B、before
C、after
D、when
答案
B
解析
本题为固定用法题。本句意为“科学家们称,可能五六年之后这种药物才能用在人身上”。“It may be…before”表示“可能过多久才……”,故选项B)为正确答案。
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