【題目】Keep quiet,Tom. Your sister in her room.

A.studiesB.has studiedC.is studyingD.studied

【答案】C

【解析】

句意:保持安靜,湯姆。你姐姐正在房間里學(xué)習(xí)。

A. studies學(xué)習(xí),動(dòng)詞三單;B. has studied已經(jīng)學(xué)習(xí),現(xiàn)在完成時(shí);C. is studying正在學(xué)習(xí),現(xiàn)在進(jìn)行時(shí);D. studied學(xué)習(xí),動(dòng)詞過(guò)去式。根據(jù)Keep quiet,Tom.可判斷,湯姆的姐姐正在房間里學(xué)習(xí)。所以后句時(shí)態(tài)應(yīng)是現(xiàn)在進(jìn)行時(shí)(am/ is/ are +doing);主語(yǔ)Your sister是單數(shù),故用is。故選C

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