题目内容
The students ________ a history class when the visitors came.A. had
B. were having
C. will have
D. are having
答案:B
提示:
提示:
| 过去的当时正在进行,用过去进行时
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题目内容
The students ________ a history class when the visitors came.A. had
B. were having
C. will have
D. are having
| 过去的当时正在进行,用过去进行时
|