6._________ no need for everybody to discuss the problem again since it has already been solved.

A.It has　 　 B.There has　 C.We have　　　 D.There is

5.I didn't like aunt Lucy,who __________ without warning and bringing us presents.

A.always turned up　　　　 B.has always turned up

C.had always turned up　　　 D.was always turning up

4.You'd better get all the work _________ before you leave.

A.finishing　　　 　 B.to finish　　 C.finished 　　　 D.be finished

3.At midnight the enemy attacked _________.

A.without warning　 B.without notice　 C.without permission　　　 D.A or B

2.They had to_________ before they finished the course because they were not well disciplined.

A.drop in B.drop out　　 C.drop off　 D.drop by

1.It looks as if they are going to _________ us a lot of money for the concert hall.

A.demand　B.cost　　　 C.charge　　　 D.ask

10.This ribbon, which must not get wet, will protect you from the electricity.

9.The key tied to the string was put into the door to stop the kite from flying away.

8.I brought my finger close to the key and felt a light but very clear electric shock.

7.In the eighteenth century, Benjamin Franklin conducted a number of experiments in which he showed what electricity is.