In the experiment we kept a watchful eye ______ the developments and recorded ev

游客2023-11-10 47

问题 In the experiment we kept a watchful eye ______ the developments and recorded every detail.

选项 A、in
B、at
C、for
D、on

答案 D

解析考查固定搭配。keep an eye on意为“密切注意”，是一个固定搭配，因此选项D为正确答案。

转载请注明原文地址:http://tihaiku.com/zcyy/3174166.html

相关试题推荐

随机试题

最新回复(0)

Inthisexperiment,theyarewakenedseveraltimesduringthenight,andaskedt