问题描述:
He was a good swimmer so he -swim to the river bank when the boat sank.A.couldBmightCshouldDwas ab
A. could B. might C. should D.was able to.答案是D.为什么A 不对,could 比be able to 语气弱,有这点区别吗? 谢谢
A. could B. might C. should D.was able to.答案是D.为什么A 不对,could 比be able to 语气弱,有这点区别吗? 谢谢
问题解答:
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