Now people would like to use _______ plastic bags to help protect the environment.

—You see, “Food Safety” receives thousands of Internet hits a day. —Yes, it becomes one of the _________ topics(话题) these days.

We have too many people in our country. Their life will be ___________ if there are ___________ children in a family.

What kind of animal do you like ____ , the tiger, the lion or the elephant?

—Could you tell me someexamination skills?—Sure. In the exam, the _______you are, the_______ mistakes you’ll make.