1、Don't leave the water ________ while you brush your teeth.
A.run B.running C.being run D.to run
2、When flint ________ to the market, these products enjoyed great success.
A.introducing B.introduced
C.introduce D.being introduced
3、"We can't go out in this weather," said Bob, ________ out of the window.
A.looking B.to look C.looked D.having looked
4、My advisor encouraged ________ a summer course to improve my writing skills.
A.for me taking B.me taking C.for me to take D.me to take
5、________ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.
A.To wait B.Have waited C.Having waited D.To have waited
参考答案:
1、B 2、B 3、A 4、D 5、C