Question

Sleep is important, and ______trouble having a good night’s rest can be very annoying.

A．having

B．have

C．had

D．have had

Answer 1

A

试题分析：考查动名词做主语：句意：睡觉很重要，睡个好觉有困难是让人恼火的。And后面的句子中can be annoying是谓语，前面是主语，用动名词做主语，选A。