9.If you had spoken clearly, you ______.

　 A would have been understood　　　 C would have understood

　 C were understood　　　　　　　　 D would understand

8.The radar sets ______ for quite a long time without any trouble.

　 A have been running　　 B have been run　　　 C have run　 　　　　D were running

7.The teacher demanded that her students ______ on time every class.

　 A are　　 　　　　　　B had been　　 　　C were　　　 　　　　D be

6.If it had rained another ten minutes, the game ______ .

　 A would be called off　　 　　　　　　　B would have called off

　 C would have been called off　　　　　　 D was called off

5.Perhaps most of the work ______ by this time tomorrow.

　 A would have been done　　 B will be done　 　C will have been done　 　D has been done

4.In recent years a number of communication satellites ______ into orbit about the earth.

　 A have been put　　 B were put　　 　　　　C had put　　 　　　　D are put

3.I’ll be going to school on foot while my bicycle ______.

　 A is repaired　　　 B is being repaired　　 　C will repaired　　 　　D has been repaired

2.The professor gave orders that the test ______ before 5:30.

　 A shall finish　　 　　B will finish　　 　　　C will be finished　　 D be finished

1.All the apparatus ______ before the experiment began.

　 A were prepared　 　B had been prepared　 C had prepared　　 　　D have been prepared

9.trips后加that或include→including　 10.bring→bringing