—Mind your steps as you go, or you’ll fall down on to the wet ground.
—_____________.
| A．Not at all | B．Thank you | C．I don’t | D．Don’t mention it |
Riding bicycles makes us ___________.
A. to keep healthy B. keep health C. keep fit
One of the cyclists _______ from America.
A. is B. are C. come
They will visit the Great Wall if it _________ tomorrow.
A. isn’t rain B. doesn’t rain C. won’t rain
Maria ____________ so fast as Jane.
A. run B. not run C. doesn’t run
_________ can help us, we had to do it by __________.
A. Somebody; ourselves B. Anybody; yourselves
C. Nobody; ourselves