— In our city, people always see the blue sky this year. What do you think of it?

— I think         trees we plant,         air our city will have.

A. the less; the cleaner       B. the most; the cleanest

C. the more; the cleaner        D. the least; the cleanest

______ are these bright purple shirts in front of the window made of?

A. Where       B. When            C. What        D. How

She asked two persons the way to the bank, but         of them could help her.

A. both    B. neither       C. either    D. all

Tom Green ________ his parents every night even while he was traveling around China.

A. called         B. is calling

C. will call       D. calls

________ delicious the mooncakes are!

A. What         B. How         C. What a        D. How a

You should talk to your parents and you will get help ________ you have a problem.

A. unless          B. if               C. until           D. so

Tom said sorry to Kate because he took her umbralla ________.

A. by accident     B. for accident

C. by mistake      D. for mistake

________ should not be asked to study at night on weekends.

A. Sixteen years old                  B. Sixteen year olds

C. Sixteen-year-old                   D. Sixteen-year-olds

Mike Miller is such a quiet student that he kept silent most of the time and ______ talked to his classmates in the school.

A. seldom     B. hard        C. ever         D. nearly

Did you know that there were ________ visitors in Luoguo Xiang in Beijing last week?

A. million       B. millions

C. million of     D. millions of