9) He had no difficulty to work out the problems.

10)I regretted to have said that to her.

B组练习 选择最佳选项

　　1. - What made you so upset?

　　 - _____ two tickets to the pop music concert.

　　 A. Losing B. Because of losing

　　 C. To lose D. Because I had lost

　　2. I can't imagine _______ that with them.

　　 A. do B. to do C. being done D. doing

　　3. He got well-prepared for the job interview, for he couldn't risk ____

　　 the good opportunity.

　　 A. to lose B. losing C. to be lost D. being lost

　　4. ___ is forbidden inside the park.

　　 A. To cycle B. We cycle C. Anyone cycles D. Cycling

　　5. I can't stand ___ with Jane in the same office. She just refuses ___ talking

　　 while she works.

　　 A. working; stopping B. to work; stopping

　　 C. working; to stop D. to work; to stop

　　6. The old lady needs ____.

　　 A. look after B. to look after

　　　　C. looking after D. being looked after

　　7. It's necessary to be prepared for a job interview. ____ the answers ready will be of great help.

A. To have had B. Having had C. Have D. Having

　　8. The parents suggested ____ in the hotel room but their kids were anxious to camp out during the trip.

A. sleep B. to sleep C. sleeping D. having slept

　　9. How I regret ___ so much time in the net bar! I should have studied harder.

A. to waste B. wasting C. wasted D. being