Question

【题目】Parents will feel a bit worried _________when their children are weak in subjects.

A. all timesB. at the same timeC. from time to timeD. at a time

Answer 1

【答案】C

【解析】

句意：当他们的孩子在学科上很差时，父母会时不时感到有点担心。

考查副词短语。A. all times总时；B. at the same time同时；C. from time to time不时地，间或，偶尔；D. at a time一次， 每次。结合句意可知选C。