Question

【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

Answer 1

【答案】A

【解析】句意：“在大庭广众之中讲话，皮特总是要搜肠刮肚地想该说的事。”have trouble(in) doing 表示做某事有困难，故用动词-ing形式。