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

试题分析:cost花费,主语是物。pay for支付,强调的是钱,主语是人。spend花费,主语是人。本句中的she’s是she has的缩写,has spent构成现在进行时。句意:你认为Sonia将通过这次数学考试吗?当然,她已经花费很多时间在数学考试上面了。故选C。
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