At present, lots of people would rather _______in the country because there is________ pollution in the city.

You’ve never been to the village, have you—-__ __. It is the most beautiful village I’ve ever seen.

How do you study ______ a test — I study ______ working with a group.

It shows that a knowledge of first aid canmake a real.

A murderer has escaped from prison, so a nationwide search for him is ________.