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[单选题]
—I'm sure Andrew will come out first in this gymnastic competition. —I think so. He ________ for it for months.(1分)
A
is preparing
B
was preparing
C
had been preparing
D
has been preparing
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试题答案：
D
答案解释：
解题思路： 句意：——我肯定安德鲁会在体操比赛中获得冠军。——我也这样认为。他已经准备了几个月了。prepare的动作从过去某一时间开始一直持续到现在，故用现在完成进行时，选D项。
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