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Tony looks in low spirits.anything wrong?yes.it was an easy

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Tony looks in low spirits.anything wrong?yes.it was an easy test and he should have passed,but he
A.didn't B.wouldn't
A
本可以通过的,可是没有,所以情绪不好
再问: 那填hadn't呢?
再答: 这里没强调过去的过去。 其实是间接地在考你对【should have +过去分词】这一结构的理解, 表示“过去本该做, 而事实上没做”, 有责备意味