科目: 来源: 题型:填空题
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科目: 来源: 题型:选择题
| A. | can save | B. | will save | C. | be save | D. | can be saved |
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| A. | how can we use it | B. | how could we use it | ||
| C. | how we can use it | D. | how we could use it |
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科目: 来源: 题型:选择题
| A. | see | B. | saw | C. | will see | D. | have seen |
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科目: 来源: 题型:选择题
| A. | before | B. | until | C. | when | D. | because |
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科目: 来源: 题型:选择题
| A. | goes over | B. | went over | C. | is going over | D. | was going over |
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