—Why．Jack, you look so tired!
—Well．I the house and I must finish the work tomorrow．
| A．was painting | B．will be painting |
| C．have painted | D．have been painting |
--- I’m not good at singing, you know.
---_________. It’s just for fun.
| A．All right | B．No problem | C．Come on | D．Cheer up |
The schedule, originally ____ out last week, had to be cancelled because of the unexpected snow storm.
| A．carried | B．to be carried | C．being carried | D．was carried |
Garter Druse ___________ his being selected for the important task to his courage，devotion and knowledge of the area.
| A．led | B．owed | C．devoted | D．contributed |
---Isn’t it a surprise that I happened to meet Francis Mathews at the Christmas Party last week?
---If my memory serves me correctly, you _____ each other for exactly two years.
| A．hadn’t seen | B．haven’t seen | C．didn’t see | D．don’t see |
When it______air pollution, Beijing faces the three “C” s-----cars，coal and construction，which lead to Beijing's thick air pollution.
| A．refers to | B．comes to | C．happens to | D．speaks to |