题目内容
【题目】He didn't visit his parents living in Toronto regularly, only __________.
A. again and again
B. time and time
C. now and then
D. since then
【答案】C
【解析】now and then相当于sometimes, 意为“有时,偶尔”;again and again 和 time and time 都译为“一次又一次地,一再”;since then 意为“自从那时”。
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