问题
选择题
As time__________, she became more and more anxious about her son’s safety.
A．passing
B．going by
C．passed
D．goes by
答案
答案：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。
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