The workers have worked for ten hours. They want to stop a rest.
| A．have | B．to have |
| C．having | D．had |
Wolves often work __________a team and they never kill for __________.
| A．as; funny | B．for; fun | C．as; fun | D．for; funny |
We should tell hunters _______tigers.
| A．don’t kill | B．not kill | C．killing | D．not to kill |
Yesterday I talked to Amy on the phone and she ______ happy.
| A．looked | B．sounded | C．smelled | D．tasted |
Can you tell us how important wildlife ___ is?
| A．protect | B．protector | C．protection | D．protected |
There are ________ bears on the earth because they have ____________ space on it．
| A．fewer and fewer；less and less | B．more and more；fewer and fewer |
| C．less and less；fewer and fewer | D．more and more；less and less |