科目: 来源:不详 题型:单选题
| A.is playing | B.have played | C.are playing | D.played |
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科目: 来源:不详 题型:单选题
| A.was | B.were | C.is | D.are |
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科目: 来源:不详 题型:单选题
| A.is; is | B.are; are | C.is; are | D.are; is |
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科目: 来源:不详 题型:单选题
| A.am | B.is | C.have | D.are |
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科目: 来源:不详 题型:单选题
| A.were | B.was | C.is | D.are |
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科目: 来源:不详 题型:单选题
| A.are exhibiting | B.is exhibiting |
| C.are being exhibited | D.is being exhibited |
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科目: 来源:不详 题型:单选题
| A.was | B.is | C.were | D.be |
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科目: 来源:不详 题型:单选题
| A.has tried; from being pulled down |
| B.have tried; from pulling down |
| C.has been tried; from pulling down |
| D.have been tried; from being pulled down |
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科目: 来源:不详 题型:单选题
| A.is ; are | B.are; is | C.have; has | D.has; have |
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科目: 来源:不详 题型:单选题
| A.is, is | B.are, are | C.is, are | D.are, is |
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