问题补充：
Don to spring-clean the whole house just because my mother is coming---theres no need to do that.
A. undertake
B. attempt
C. bother
D. hesitate
答案：
A. undertake
B. attempt
(答案→)C. bother
D. hesitate
解析：考查动词词义辨析。A承担，从事；B尝试；C麻烦；D犹豫；句意：以为妈妈来了，你就不要麻烦大扫除了，你没有必要做了。Bother to do sth麻烦做某事；根据句意说明C正确。
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