Перепиши предложения, раскрыв скобки с глаголом, то есть, поставив его в нужную форму PresentContinuous. Например: They (do) homework at present. - They are doing at present.
1. Listen! The birds (sing) in the garden.
2. We (go) for a walk.
3. She (make) a pie

B. Сделайте данные предложения отрицательными.
Например: They are doing at present. - They are not doing at present.
1. We are listening to the teacher.
2. I am writing on the paper.
3. You are learning English Grammar.

C. Сделайте данные предложения вопросительными.
Например: They are doing at present. - Are they doing at present?
1. He is going to the cinema.
2. The horses are running very fast.
3. Mary is helping her mother to cook.

A) 1. Listen! The birds are singing in the garden.

2. We are going for a walk.

3. She is making a pie.

B) 1. We are not listening to the teacher.

2. I am not writing on the paper.

3. You are not learning English Grammar.

C) 1. Is he going to the cinema?

2. Are the horses running very fast?

3. Is Mary helping her mother to cook?

Объяснение:

Some people say that damage to the environment is the biggest problem facing the world. However, other people say that there are other problems that are more important.

Some people think that environmental problems are the most dangerous whereas others don’t agree.

I think that nowadays environmental catastrophe is the biggest threat. First of all, global worming can bring us a lot of troubles. If the ice melts, a lot of countries will be flooded. Second, Ozone holes can cause the death of a lot of lands. Also bad food, air and water can be the reason of various diseases.

At the same time there are people who say that overpopulation, lack of food and nuclear war can be even more dangerous.

In my opinion these people have a point. These threats can kill our planet too. Nevertheless, they are easier to control than environmental problems. Nuclear moratorium, new technologies allow us to solve these problems.

In conclusion I'd like to say that if we weigh all the facts that say that danger to the environment is the biggest problem against the ones that support other threats, we'll see that the facts that support the statement outweigh those against.