单选题
2级
2010-11-07
He lost all his money. The only thing he could do was to call his wife for help at this moment.

参考答案
D
答案解析
[分析]结构应用
本句考察的是动词不定式作表语,但因主语中含有do,要省略do。因此选项D为答案。
本句考察的是动词不定式作表语,但因主语中含有do,要省略do。因此选项D为答案。
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