会员中心

当前位置：答题翼 > 问答 > 外语类考试 > 正文

目录：标题| 题干| 答案| 搜索| 相关

问题

Scientists say it may be five or ten years ______ it is possible to test this medicine on

Scientists say it may be five or ten years ______ it is possible to test this medicine on human patients.

A．since

B．when

C．after

D．before

参考答案

您可能感兴趣的试题

暂无相关推荐

最新题目

Even as a girl ____ to be her life and theater audiences were to be her best teachers.A...
Tony has not the least _______ of giving up his research work.A.intentionB.interestC.wishD..
1 For the Greeks beauty was a virtue: a kind of excellence. Persons then were assumed to..
English belongs to _______ family while Chinese belongs to ______ family.A.Latin; sino -..
The President during the American Civil War was ______.A.Thomas JeffersonB.Andrew JacksonC..
If he ________ on tourists for his business he would have to close his shop.A.dependsB.wi..