— At present, one of the best ways to study is working in groups.—More chances _______ to students to learn from each other.

You have to be 18 years before you _________ to drive a car.

Many trees ________ along the streets every year. So the air is very fresh now.

If the question_________ incorrectly,_________question will be given to you.

--Do you know Mr Black _    _ by the police? --Yes. He’s believed to have killed a woman~