21.??Tom, why were you _____ from school yesterday? -—I got a bad cold and my mother took me to the doctor’s. A. absent B. present C. left D. lost ...

16.??Please remember to keep in ____ with me through e-mail when you are abroad. A. touch B. trouble C. promise D. approval ...

11.??The book is different _____ all the other books I’ve ever rea## A. from B. to C. on D. among ...

6.??I’m sorry I was late this morning. But it was not my _____; the road was blocked for half an hour because of an accident. A. mistake B. fault C. error D. sickness ...

1.??If you have any trouble, you can turn ____ him for help. A. for B. at C. to D. in ...

18. He bought an expensive coat _____he had no jod. A. unless B. since C. although D. till ...

10. Please remember to keep in ____ with me through e-mail when you are abroad. A. touch B. trouble C. promise D. approval ...

5. It’s reported that the police are _____the area for the criminal (罪犯). A. processing B. searching C. operating D. handling ...

23: That was a difficult question, but Mary still _________ to work it out. A: did B: failed C: kept D: managed ...

28: _________ the War of Independence, the United States was an English colony． A: Before B: At C: In D: Between ...