Our research has focused on a drug which is so powerful able to change brain chemistry. A. as to be ...
2022-10-01 05:28:47 68次 江苏省如皋市2016-2017学年高二 选修七 Unit 1 Living with technology 课时练习 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Our research has focused on a drug which is so powerful able to change brain chemistry.
A. as to be B. as not to be
C. as being D. as not being
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