【題目】Don't trouble your brother. He _________ on a new computer program.

A. worksB. was workingC. is workingD. has worked

【答案】C

【解析】

句意：別麻煩你弟弟。他正在編寫(xiě)一個(gè)新的計(jì)算機(jī)程序。考查動(dòng)詞時(shí)態(tài)辨析。根據(jù)Don't trouble your brother.可知弟弟正在做某事，需用現(xiàn)在進(jìn)行時(shí)，故選C。

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