科目: 来源: 题型:选择题
A. | has developed | B. | developed | C. | develops | D. | was developing |
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A. | must | B. | can | C. | should | D. | would |
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A. | performed | B. | was performed | C. | performs | D. | is performed |
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科目: 来源: 题型:选择题
A. | kill | B. | killing | C. | to kill | D. | having killed |
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科目: 来源: 题型:选择题
A. | are | B. | were | C. | had been | D. | would be |
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A. | make sure | B. | to make sure | C. | made sure | D. | making sure |
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科目: 来源: 题型:选择题
A. | have I seen | B. | I have seen | C. | did I see | D. | I saw |
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科目: 来源: 题型:选择题
A. | will work | B. | have worked | C. | will be working | D. | was working |
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科目: 来源: 题型:选择题
A. | trapped | B. | trapping | C. | having trapped | D. | to be trapped |
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科目: 来源: 题型:选择题
A. | could have charged | B. | might charge | ||
C. | should have charged | D. | would charge |
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