—You should ______ careful in your work and life every day.
—You’re right.
A.be B.are C.is D.am
—_____ do you _____ English? —I like it very much.
A. How; think of B. What; like C. How; like to D. What; think of
—Which bus do I need _____? — Bus No. 818.
A. to sit B. to take C. sitting D. taking
The sign means “ _____”. 
A.No parking B.No U-turn C.No left turn D.No right turn
Look! The students _____ the classroom.
A.clean B.are cleaning C.are clean D.cleaning
—May I use your bike? —_____
A.Of course not. B.Of course. Here you are. C.I don’t have a bike. D.No, thanks.
