We must practice_____Chinese every day.
| A．speak | B．speaking | C．speaks | D．to speak |
There are________many students on the playground．I can hardly find Tom．
| A．so |
| B．such |
| C．very |
| D．pretty |
—Excuse me．what’s this for？
—It’s a cleaner and it________to pick up dirt．
| A．uses |
| B．is used |
| C．is using |
| D．used |
We believe scientists will________a way to solve the air pollution．
| A．set off |
| B．put off |
| C．come up with |
| D．catch up with |
Could you________the restaurant and order sortie take－away food for me？I’m a little hungry．
| A．call up |
| B．call on |
| C．call at |
| D．call for |
—Attention，please．The plane has to be________because of the heavy rain．
—Oh，bad luck！We have to wait now．
| A．put on |
| B．put off |
| C．put up |
| D．put away |