—What do you think of Ann?—Ann is so careful that she always goes over her exercises to ______ there are no mistakes.A.look forB.make sure C.find outD.think about
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b
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B解析试题分析：look for寻找；make sure确认；find out查明，找出；think about考虑。句意：你认为安怎么样？安是如此小心，以至于她总是检查她的练习，来确认没有错误。结合语境可知选B。考点：短语辨析
点评：解答此类题型的要点是了解各个短语的基本含义及用法的不同，同时注意其表示多个含义的现象，然后结合语境选择合适