11. Not having enough green food leads to poor health and, ______ , sickness.

　　A. however B. otherwise C. therefore D. instead

　　12. I was on the highway when this car went past followed by a police car. They ______ at the speed of 150 kilometers an hour at least.

　　A. should have been driving B. must have been driving

　　C. could have driven D. would have driven

　　13. All the food for this winter has ______, ______ the bag of flour that John gave us several days ago.

　　A. run out; containing B. been run out; containing

　　C. been run out; including D. rung out; including

　　14. --- Have you ever been to the city of Beijing, our capital?

　　--- Yes, only once. I ______ there only for two days.

　　A. had stayed B. were staying C. have stayed D. stayed

　　15. ______ it has been raining during the weekends? Our plan to travel may be cancelled.

　　A. What if B For what C. If only D. So what

　　16. Children, either in the city or in the country, should have ______ to the equal education.

　　A. chance B. choice C. access D. approach

　　17. -- What was she anxious to know?

　　-- She wondered ________ the workers could complete the decoration.

　　A. when it was B. it was when that

　　C. it was when D. when it was that

　　18._______, our ears are accustomed to sounds between 40 to 50 decibels. But in the settings like a KTV, the volume usually goes up to 80 to 90 decibels, which can cause damage to the ears.

　　A. Regularly B. Fortunately C. Frequently D. Normally

　　19. --- Have you told Joan the bad news that her grandfather fell off the bike and hurt seriously?

　　--- Yes. I told her ________I saw her this afternoon.

　　A. while　　　　 B. the moment　　 C. until　　　　　D. suddenly

　　20. ---The cake made by your mother is really delicious. Can I have another piece?

　　---_______ .

　　A.. Behave yourself. B. You could C. Be my guest. D .Do it yourself.