题目内容
10．I usually go to school __________ bike，but sometimes ____________foot．（ ）| A． | by，by | B． | on，on | C． | by，on | D． | on，by |
分析 我通常骑自行车上学，但有时步行去．
解答 答案：C．考查介词．句意"我通常骑自行车上学，但有时步行去．"．第一个空，by bike骑自行车，介词短语做状语．第二个空，on foot步行，介词短语做状语．答案是C．
点评 考查介词用法，这个知识点很广泛，有一些固定用法，需要日常积累，结合语境选择正确介词完成习题．
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