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5.I __________my new mobile phone for several weeks;however,I'm still not familiar with all of its functions.(  )
A.have been usingB.had been usingC.usedD.had used

分析 我使用我的新手机几周了;然而,我还是不熟悉它所有的功能.

解答 答案:A 考查时态辨析.根据下文"我还是不熟悉它所有的功能",表示一直使用到了现在,要用现在完成时行时态.B项是过云完成进行时态,本题中并没有表示过去的时间;C项是一般过去时态,同样没有表示过去的时间;D项是过去完成时态,同样没有表示过去的时间.

点评 解答此类问题要了解各种时态的基本含义,并区别各种时态之意的差异,了解某些时态在特定的时间上的用法,然后结合语境选择正确答案.

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