Question

What great trouble the boy _____his father to give up smoking!

1. A.
   had to persuade
2. B.
   had persuaded
3. C.
   had persuading
4. D.
   had persuade

Answer 1

C
试题分析：考查固定句型。做此题时应注意将题干还原成陈述句结构：The boy had great trouble (in)persuading his father to give up smoking。have trouble/problems/a hard time (in) doing sth表示做某事非常费力，句中的in可以省略。句意：那男孩说服他父亲戒烟费了多大劲啊！ 故C正确。
考点：考查句型have trouble （in）doing sth中v-ing的用法。