— _____ do you _____ math?—I like it a lot.

—        does Kangkang go to the park?  —Four times a month.

The air in Dongying is much worse than that in many other cities. We must do       to protect our environment. 

There are many people in the park. Some are walking along the lake.  _________ are sitting on the grass.

I want to live in a big house _______ a beautiful garden.