The main reason is________endangered animals．
| A．to protect |
| B．protect |
| C．to protecting |
| D．protects |
Smoking is not allowed in our school, so it may be a good chance for our math teacher to_______ smoking.
| A．put up | B．give up | C．pick up | D．look up |
She looked at the professor and wondered where she_______ him.
| A．saw | B．has seen | C．sees | D．had seen |
- How often do you play basketball?
-_______. I am too busy to relax myself.
| A．Sometimes | B．Usually | C．Hardly ever | D．Always |
It worries our government a lot that the air in our city is _______than it used to be.
| A．very good | B．much better | C．rather bad | D．even worse |
- You are always talking about your pet dog. Could you tell me what it is like?
-_______.
| A．It likes meat. | B．It's three years old. |
| C．It's small and cute. | D．It likes playing. |