I ______ go to bed______ my mother came back home.
| A．won’t, until | B．didn’t, until |
| C．will, until | D．won’t,when |
They didn’t go to bed ________ they finished their homework.
| A．when | B．because | C．until | D．if |
Everyone in China tried ______ something for the Beijing Olympic Games.
| A．to do | B．does | C．do | D．did |
It’s hard to ________ this kind of plant. You have to water it every day.
| A．look for | B．look at | C．look after | D．look like |
I don’t think fast food is good for our health, so I _______ go to MacDonald.
| A．hardly | B．always | C．usually | D．often |
—_________ did he play soccer? —About 3 hours.
| A．How many | B．How much | C．How often | D．How long |