(      ) 1.Do you know something about Wuyishan?

---Yes, it is one of _______ mountains in China.

A. beautiful         B. more beautiful        C. the most beautiful

(      ) 2.— Would you mind_________ my pet cat while I’m away?

—Of course not . I like pet, too.

A. to look after      B.  looking after           C. look after

(      ) 3.— They felt too tired to work on Monday morning, _________ they?  —Yes, they did

A. didn’t            B. did                    C. do