A number of tests have been conducted to _________ that these drugs have no side effects. A. find o...
2023-02-12 17:35:18 100次 黑龙江省哈师大附中09-10学年高一下学期模块考试 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
A number of tests have been conducted to _________ that these drugs
have no side effects.
A. find out B. look
for C. make
sure D. work out
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