6. Unless you both stop ____, I will call in the police.

　A. fighting　　 B. to fight　　 C. having fought　 D. being fought

5. Don’t forget ____to me . Let’s keep in touch.

　A. to write　　 B. writing　　 C. having written D. to have written

4. ____ no persuading him to buy the car.

　A. There was　 B. It was　　　 C. Here was　 D. That was

3. We never listen to Beethoven without ____.

　A. being deeply impressed　　 B. impressed deeply

　C. having deeply impressed　　 D. to be deeply impressed

2. Every morning he spends two hours ____ papers and magazines.

　A. for reading　 B. on reading　 C. reading　　 D. to read

1.　　　 People call that___ two birds with one stones.

　A. kill　　　 B. killed　　　 C. killing　　　 D. had killed

54.Let’s find a box _____.

A. for us to put the books in it　　 B. to put the books in

C. to put the books in it　　　　　 D. to put the books

53. We found the exercise difficult____ without the help of the teacher.

　A. to be done　 B. to do　　　　 C. to do it　　 D. of doing

52. This coat is too hot ____in this warm weather.

　A. to be worn　 B. to wear　　　 C. wear it　　 D. not to wear

51. This park is a very pleasant place____.

　A. to visit　　 B. to be visited　　 C. to visit it　 D. of visiting