Mary，put on your coat，________you’ll catch a cold．
| A．and |
| B．or |
| C．so |
| D．but |
He _______ eight hundred thousand dollars for his Benz(奔驰) car.
| A．paid | B．cost | C．took | D．spent |
She told us that she _______ her handbag on the bus.
| A．left | B．forgot | C．missed | D．failed |
—_______? —My watch doesn’t work.
| A．Why are you here | B．How do you do |
| C．What’s wrong | D．What’s this |
I won’t leave here until my mother _______ back.
| A．will come | B．is coming | C．came | D．comes |
We really don’t know _______. Could you help us?
| A．how to do | B．what to do |
| C．to do what | D．to do how |