科目: 来源:不详 题型:单选题
| A.is | B.are | C.will be | D.were |
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科目: 来源:不详 题型:单选题
| A.serve | B.servers | C.is served | D.are served |
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科目: 来源:不详 题型:单选题
| A.becomes | B.became | C.has become | D.had become |
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科目: 来源:不详 题型:单选题
| A.is; is | B.is; are | C.are; is | D.are; are |
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科目: 来源:不详 题型:单选题
| A.age has | B.ages have | C.times have | D.time has |
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科目: 来源:不详 题型:单选题
| A.work | B.working | C.is working | D.are working |
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科目: 来源:不详 题型:单选题
| A.is working | B.works | C.work | D.worked |
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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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科目: 来源:不详 题型:单选题
| A.are | B.is | C.being | D.to be |
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科目: 来源:不详 题型:单选题
| A.go | B.went | C.has gone | D.have gone |
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