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| A.is; are | B.are; is | C.are; are | D.is; is |
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| A.have | B.were | C.was | D.had |
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| A.is | B.are | C.am | D.be |
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科目: 来源:不详 题型:单选题
| A.lay | B.lie | C.lies | D.laid |
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科目: 来源:不详 题型:单选题
| A.is | B.are | C.was | D.were |
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| A.plant; is | B.plants; is | C.planting; is | D.planting; are |
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科目: 来源:不详 题型:单选题
| A.is | B.are | C.were | D.will be |
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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.knows | B.know | C.have known | D.knew |
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科目: 来源:不详 题型:单选题
| A.are being built | B.were being built |
| C.was being built | D.is being built |
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