Havinhg been ill in bed for nearly a month,he had a hard time ______ the exam.A pass B to pass C passed D passing这里为什么选D啊,D在这里作什么成分呢

Havinhg been ill in bed for nearly a month,he had a hard time ______ the exam.A pass B to pass C passed D passing这里为什么选D啊,D在这里作什么成分呢
Havinhg been ill in bed for nearly a month,he had a hard time ______ the exam.
A pass B to pass C passed D passing
这里为什么选D啊,D在这里作什么成分呢

Havinhg been ill in bed for nearly a month,he had a hard time ______ the exam.A pass B to pass C passed D passing这里为什么选D啊,D在这里作什么成分呢
人家都说答案是D了地说..
have a hard time doing （做某事有困难）相当于：have trouble doing sth.
而"have a hard time to do"是错误的,没有这个表达法.
这里是固定搭配哦~!

这个属于have+(adj.)+time+doing sth.

B

have a hard time doing （做某事有困难）
= have trouble/difficulty （in)doing sth
所以是D