--- What ________ the number of the students in your school?
--- About two thousand. A number of them __________ from England.
| A．is; is | B．are; is |
| C．is; are | D．are; are |
Don’t forget to wash your hands _________ you have meals.
| A．before | B．until | C．though | D．unless |
Look! Jack and his monkey _________ flying disk together in the garden.
| A．is playing | B．was playing | C．are playing | D．were playing |
Peter likes music _________is very loud and energetic.
| A．that | B．who | C．whom | D．/ |
If you sit in a chair _____a long time, your back may begin to hurt.
| A．at | B．in | C．on | D．for |
Photography can be ______excellent hobby for kids.
| A．/ | B．a | C．an | D．the |