＿＿＿＿＿ is our duty ＿＿＿＿＿ the environment.
| A．This; protect | B．It; to protect |
| C．This; protecting | D．It; protect |
He often knocks our books _______the floor.
A. into B. onto C. off D away
Can we have _____ food?
| A．any more | B．more any |
| C．some more | D．more some |
I believe what he says because he is ______ honest boy.
| A．a | B． / | C．an | D．the |
— I’m nervous to give a talk before so many people.
— _______, Maria. You can do it.
| A．That’s true | B．Come on |
| C．With pleasure | D．Good luck |
China is larger than _______in Africa(非洲).
| A．any country | B．any other country |
| C．the other countries | D．any countries |