【单选题】
You must clean the classroom, ____ you?
【单选题】
15. She had ____ to do, so she was free.
【单选题】
Could you ____ me a favor by shutting the door?
【单选题】
The students were all entertained in a Mexican restaurant, at Professor Brians ____.
【单选题】
17. A survey was carried out on the death rate of new-born babies in that region, ____were surprising.
【单选题】
Every morning Mr. Smith takes a ____walk to his office.
【单选题】
20. She never sang, ____ dance.
【单选题】
He was ____ in his work and didn’t hear me come in.
【单选题】
In English some surnames ____ occupations or people. ?
【单选题】
18. At thirty-three he ____ the chance of a new start in computer business.