单选题
He lost all his money. The only thing he could do was
to call
his wife for help at this moment.
A、
being called
B、
to be called
C、
calling
D、
call
【正确答案】
D
【答案解析】
[解析] 本句考查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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