【題目】I ____ a tour guide for 7 months.

A. became B. was C. have been D. have become

【答案】C

【解析】句意:我當(dāng)導(dǎo)游已經(jīng)7個(gè)月了。一方面,有時(shí)間狀語(yǔ)for 7 months可知,是表達(dá)到目前為止的時(shí)間,用現(xiàn)在完成時(shí)態(tài);另一方面become是非延續(xù)性動(dòng)詞,不能和表示一段時(shí)間的狀語(yǔ)連用,故答案選C。

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