问题补充：
Mother always complains that children their shoes very quickly.
A. find out
B. wash out
C. wear out
D. set out
答案：
A. find out
B. wash out
(答案→)C. wear out
D. set out
解析：C考查动词短语辨析。句意：母亲总是抱怨孩子们很快就把鞋子穿烂了。A：查明，弄清；B：洗净；C：穿烂，用坏；D：动身，出发，开始干。根据语境应选C项。
