It’s necessary _________ us _________ more trees in spring every year.
| A．of; to plant | B．for; to plant |
| C．of; planting | D．for; planting |
—________do they go to the park？
—Because they want to play games there．
| A．Why |
| B．What |
| C．When |
| D．Who |
—Let’s go to the zoo on Sunday morning．
—________．
| A．Not at all |
| B．Thank you very much |
| C．That sounds good |
| D．It’s very interesting |
The________often cat grass on the hill．
| A．chicken |
| B．horse |
| C．cow |
| D．sheep |
You can see an________in the zoo．
| A．tiger |
| B．elephant |
| C．giraffe |
| D．panda |
—I think recycling books and paper is useful．
—________
| A．I quite agree． |
| B．I have no idea． |
| C．We shouldn’t use such things． |
| D．That’s a great idea． |