4. Is----------- necessary to take off our shoes when we enter the lab?

　　A. everyone B. this C. her D. it

　　5. ________ will take you a lot of time to find him in the crowd.

　　A. It B. I C. We D. They

　　6. It is no use his _________ there, the situation is hopeless now.

　　A. to go B. to be going C. going D. having gone

　　7. It is never too late to learn, ________?

　　A. is it B. isn’t it C. does it D. doesn’t it

　　8. ___________ is known to all that Shenzhou VI Launched Successfully.

　　A. As

　　B. What C. It

　　D. That

　　9. _______ is reported in the newspaper, the Earthquake in east China's Jiangxi Province killed 13 people

　　A. It

　　B. As C. That D. What

　　10. ___________ certain that his invention will make people’s life convenient.

　　A. That’s B. This is C. It’s D. What’s

　　11. _________ that there is another football match on the air this evening.

　　A. It says B. It was said C. It is said D. What was said

　　12. __________ that their daughter got an opportunity to study abroad.

　　A. It’s a exciting news B. This is an exciting news C. This is exiting news D. It’s exciting news

　　1 ______ he will come is certain.

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