题目内容
10．Doing（do ） my homework often costs me half an hour．分析 做作业经常消耗我一个小时．
解答 答案：doing 考查单词填空．根据题干：用动名词作主语，故答案是doing．
点评 解答此题的关键是根据语境推测要填内容表达的含义，然后能理解各选项内容，有时可能没有必要细细区分每个单词的含义，仅根据句子语气就可以判断出正确答案．
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