游客
题文

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

A.in B.at
C.for D.on
科目 英语   题型 单选题   难度 容易
知识点: 介词
登录免费查看答案和解析
相关试题

______ apple fell from the tree and hit him on ______ head.(

A. An; the B. The; the C. An; 不填 D. The; 不填

Are you all right?

A. That's OK B. I think so C. Take it easy D. It's very kind of you

The terrible accident almost_____ the driver his life.

A.valued B.counted C.took D.cost

Once out of the earth’s gravity, the astronaut is____by the problem of weightlessness.

A.affected B.effected C.related D.offered

The beauty of the place ______ them to pause in their hike and rest a while.

A.allowed B.switched C.invited D.addicted

Copyright ©2020-2025 优题课 youtike.com 版权所有

粤ICP备20024846号