His parents devoted all their energy ________ children.
| A． to educate | B． educate |
| C． to educating | D． education |
－I think students should be allowed _____ homework with friends.
－I disagree. They talk instead of ________ homework.
| A．do, doing |
| B．to do, to do |
| C．to do, doing |
| D．doing, to do |
Ｉdidn’t go to bed _______ I finish my homework.
| A．after | B．when | C．if | D．until |
The boys don’t know ___________.
| A．how do they swim |
| B．how swim |
| C．they how swim |
| D．how to swim |
— You didn’t use to play tennis, ______?
— Yes. I still like playing tennis now.
| A．didn’t you |
| B．did you |
| C．weren’t you |
| D．were you |
__ they were not rich, they tried their best to send their child to the best school.
| A．However | B．Because | C．Even though | D．So |