According to ______ survey，there're more and more young people who go for a walk at ______ dusk instead of sitting in front of the computer.
| A．a；the | B．a；不填 | C．the；the | D．不填；不填 |
People around the country were excited __________ the astronauts came back to the earth safely.
| A．unless | B．but | C．until | D．because |
—I’ll call Bob and tell him the good news.
—You __________ do that. He was here just now and heard it.
| A．couldn’t | B．mustn’t | C．shouldn’t | D．needn’t |
Susan __________ for our newspaper any more. She has been hired by a fashion magazine.
| A．doesn’t work | B．wouldn’t work | C．didn’t work | D．hadn’t worked |
We should go to the cinema early. __________, there won’t be any tickets left.
| A．However | B．Otherwise | C．Besides | D．Instead |
—Why didn’t you answer the phone when I called you last night?
—Sorry, I __________ a bath upstairs.
| A．am having | B．have | C．was having | D．had |