A) Read about some environmental problems and possible ways out of them. • water pollution
• air pollution
• land pollution
• disruption
• global warming
— people shouldn't leave litter in the streets
— plants shouldn't dump chemical wastes into rivers / atmosphere / on land
— concentration of smoke in the air should - be controlled
— we should stop killing animals
— the number of cars should be reduced

b) Match problems with their solutions and write as in the example. Use 2nd Conditional. Example: If plants didn't dump chemical wastes into rivers there wouldn't be water pollution.​

1. What are you doing? - We are preparing for the concert.
2. Where are you going? - I'm going to the library.
3. Where is Nicholas? - He's in the reading room. Is doing his homework there. Nicholas often does his homework  in the reading room.
4. Is Lena at home? - No, it's not at home. She is having a music lesson. She always has music classes at this time.
5. Do not make noise. Kovalenko is speaking on the telephone.
6. Do not go into that room. There's a group of our students sitting a Maths exam.
7. Students sit examinations twice a year.
8. His son is going to become an economist.

2. Didn't miss

3. Did you like, I did

4. Did you watch

5.  answered

6. didn't

7. Если вопросительная форма, то Did your friends, если утвердительное, то Your ...

8. didn't cook, cooked

9. How many questions did they ask?

10. love

Объяснение:

Past simple.

Утвердительное предложение образуется постановкой глагола во второй форме, либо если глагол правильный, то добавлением к глаголу окончания -ed.

Отрицательная форма строится Didn't + глагол в первой форме.

Вопросительная форма строится Did + глагол в первой форме.