Selecting a mobile phone for personal use is no easy task because technology ____ so rapidly.

A. is changing        B. has changed       C. will have changed    D. will change

A


解析:

題干中主句為Selecting a mobile phone …is no easy task,謂語(yǔ)動(dòng)詞表示了一種“含此刻在內(nèi)的廣泛意義上的現(xiàn)在時(shí)間”，使用的是一般現(xiàn)在時(shí)態(tài)（…is no easy task）;后面的狀態(tài)從句（because…）中則說(shuō)明原因?yàn)椤凹夹g(shù)更新變化迅速”，應(yīng)采用現(xiàn)在進(jìn)行時(shí)：（technology）is changing(so rapidly).現(xiàn)在進(jìn)行時(shí)態(tài)在此表示了一種“持續(xù)變化”的狀態(tài)，體現(xiàn)了“變化、趨勢(shì)、發(fā)展和進(jìn)展”

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B
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