题目内容
【题目】When Peter speaks in public, he always has trouble ______ the right things to say.
A. thinking of
B. to think of
C. thought of
D. think of
【答案】A
【解析】句意:当众讲话时,彼得总是费好大劲儿找合适的事情来说。have trouble doing sth.“做某事有困难”。
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