全部题库 / 2级 / 试题详情
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。