– 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，主語是物。pay for支付，強調的是錢，主語是人。spend花費，主語是人。本句中的she’s是she has的縮寫，has spent構成現(xiàn)在進行時。句意：你認為Sonia將通過這次數(shù)學考試嗎？當然，她已經花費很多時間在數(shù)學考試上面了。故選C。
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