She didn’t ask Joe ______ it because she had made Jack ______ it.
| A．to do, to do | B．to do, do |
| C．do, to do | D．do, do |
Most children are interested in amazing things, and they wonder ______.
| A．When can they see UFOs. |
| B．how can elephants walk on tiptoe |
| C．why do fish sleep with their eyes open |
| D．why there is no plant life without lightening |
---You bought the car ten years ago? ---Yes. ______ it’s old, it still runs well.
| A．Because | B．Since |
| C．Although | D．But |
---Relax. Don’t work today. Just ______. ---Thanks a lot.
| A．deal with | B．take it easy |
| C．turn off | D．stay away from |
I don’t think one country can solve the problem of pollution alone, _______?
| A．do I | B．may I |
| C．can it | D．can’t it |
--- Have you finished all your homework?
--- Of course. I ______ it before I went out to play football.
| A．had finished | B．have finished |
| C．finished | D．was finishing |