科目: 来源: 题型:填空题
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科目: 来源: 题型:选择题
| A. | signed up | B. | had signed up | C. | signs up | D. | has signed up |
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科目: 来源: 题型:选择题
| A. | have | B. | had | C. | were having | D. | have had |
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科目: 来源: 题型:选择题
| A. | were enjoying | B. | would have enjoyed | ||
| C. | would be enjoying | D. | will enjoy |
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