【題目】Please turn off the radio! I __________over some difficult maths problems.

A. thinkB. have thoughtC. am thinkingD. will think

【答案】C

【解析】

句意：請(qǐng)關(guān)掉收音機(jī)！我正在想一些難的數(shù)學(xué)題。考查時(shí)態(tài)。A. think一般現(xiàn)在時(shí)；B. have thought現(xiàn)在完成時(shí)；C. am thinking現(xiàn)在進(jìn)行時(shí)；D. will think一般將來(lái)時(shí)。根據(jù)句意請(qǐng)求別人關(guān)了收音機(jī)，所以應(yīng)是現(xiàn)在需要思考問(wèn)題。故選C。

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