1.My friends did what they could （help） me out when I was in difficulty.
答案：to help
2.Don’t be discouraged. （take） things as they are and you’ll enjoy every day of your life.
答案：Take
3.They didn’t like my suggestion that we （share） the cost of the trip.
答案：share
4.Professor Wang once （work） in Africa with wild animals for eight years.
答案：worked
5.-I ran my car into a tree yesterday.
-I suppose you （drive） too fast.
答案：were driving
6.Before they reached the house,a new wave came, （sweep） down trees and brought down some walls.
答案：swept
7.I lost my way in complete darkness and, （make） matters worse,it began to pour.
答案：to make
8. （produce） different kinds of pianos,the factory is sure they can satisfy people’s needs.
答案：Having produced
9.He （play） football with other boys when he should have been doing his homework.
答案：was playing
10.He kept looking at her, （wonder） whether he had seen her somewhere.
答案：wondering