2. 外语
  3. It was the second time that she______ as a babysitter during the summer vacation.

It was the second time that she______ as a babysitter during the summer vacation.

admin2010-02-22  41
问题 It was the second time that she______ as a babysitter during the summer vacation.
选项 A、worked
B、had worked
C、could have worked
D、must have worked
答案B
解析
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