Question

When Peter speaks in public, he always has difficulty ______ 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：考查固定词组。固定词组have some difficulty (in) doing sth做某事有困难。句意：当Peter当众发言的时候，他总是很难想起要说的事情。故A正确。
点评：固定词组have some difficulty (in) doing sth做某事有困难，注意其结构的变化。