题目列表(包括答案和解析)
28. In the experiment we kept a watchful eye ________ the developments and recorded every detail.
A. in B. at
C. for D. on
In the experiment we kept a watchful eye ________ the developments and recorded every detail.
A. in B. at C. for D. on
In the experiment we kept a watchful eye ________ the developments and recorded every detail.
A. in B. at C. for D. on
In the experiment we kept a watchful eye ________ the developments and recorded every detail.
A. in B. at
C. for D. on
.In the experiment we kept a watchful eye ______ the developments and recorded every detail.
a. in b. at c. for d. on
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