科目: 来源:不详 题型:单选题
| A.have produced | B.have beenproduced |
| C.are producing | D.are beingproduced |
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科目: 来源:不详 题型:单选题
| A.get to know | B.have known | C.knew | D.got to know |
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科目: 来源:不详 题型:单选题
| A.cleaned | B.cleans | C.have cleaned | D.is cleaning |
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科目: 来源:不详 题型:单选题
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科目: 来源:不详 题型:单选题
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科目: 来源:不详 题型:单选题
| A.have known; have known | B.did know; knew |
| C.did know; have known | D.have known; knew |
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科目: 来源:不详 题型:单选题
| A.left | B.has left | C.has been away | D.has been left |
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科目: 来源:不详 题型:单选题
| A.returns; finishes reading |
| B.will return; will finish to read |
| C.will return; finishes to read |
| D.will return; finishes reading |
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科目: 来源:不详 题型:单选题
| A.have been | B.have gone | C.am going | D.had been |
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