Question

As time__________, she became more and more anxious about  her son’s safety.

A．passing

B．going by

C．passed

D．goes by

Answer 1

C

句意：随着时间的经过，她变得越来越对儿子的安全担忧。题中As是连词，前后是完整的句子，后一个分句用的是过去式，所以前一个分句也应用过去式，选C。