__ we are young, we can still do something to help protect the environment.
| A．If | B．Since | C．Because | D．Though |
I like swimming better than climbing, because I think climbing is ________ swimming.
| A．not as exciting as | B．the most exciting |
| C．as more exciting than | D．not as more exciting as |
We haven’t got any coffee. Let’s have tea __________.
| A．either | B．however |
| C．instead | D．instead of |
Don’t say bad words ______ your friends. It’s ________.
| A．about, polite | B．to, impolite |
| C．at, polite | D．about, impolite |
____________ careful you are, _____________ mistakes you’ll make.
| A．The more, the fewer | B．The less, the fewer |
| C．The more, the less | D．The less, the less |
–Would you please give me a hand and take the bookcase upstairs?
---_______.
| A．I’ll be glad to | B．Let’s go |
| C．Of course I do | D．Yes, that’s all right |