题目内容
Alison has been skating ________ four hours.A. since
B. about
C. for about
答案:C
提示:
提示:
for后面跟一段时间
since后面跟过去的某一时间点
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题目内容
Alison has been skating ________ four hours.A. since
B. about
C. for about
for后面跟一段时间
since后面跟过去的某一时间点
|