Question

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

A

试题分析：本题考查固定搭配，have trouble in doing sth.做…有困难，in可以省略，句意：当彼得在公共场所讲话时，他总是找不到适当的话说。所以答案为A。
点评：have trouble( in) doing sth. .做…有困难还可以用have difficulty （in） doing sth.学生可能由于固定搭配不清楚而出错。