– Do you think Sonia will pass the math exam?
– Sure. She’s ________ so much time on it.
A. cost                 B. paid                 C. spent
C

試題分析：cost花費(fèi)，主語(yǔ)是物。pay for支付，強(qiáng)調(diào)的是錢，主語(yǔ)是人。spend花費(fèi)，主語(yǔ)是人。本句中的she’s是she has的縮寫(xiě)，has spent構(gòu)成現(xiàn)在進(jìn)行時(shí)。句意：你認(rèn)為Sonia將通過(guò)這次數(shù)學(xué)考試嗎？當(dāng)然，她已經(jīng)花費(fèi)很多時(shí)間在數(shù)學(xué)考試上面了。故選C。
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