问题
选择题
I sometimes think that all his supposed mistakes are made ______ just to make me angry.
A．at dusk
B．on purpose
C．right away
D．as usual
答案
答案：B
四个选项分别表示在黄昏、故意的、立刻和照例，根据题意选B，有时我想他犯的所有错误都是有目的的，就是为了让我发怒。
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