Поставьте глаголы в скобках в present perfect или present indefinite. 1. i can`t speak about the book. i (not read) it yet. 2. every day i (wind up) my watch at 7 o`clock in the morning. 3. it`s friday. you (see) him this week? 4. it`s a pity, but i (not buy) this dictionary yet. 5. as a rule we (do) many exercises in class. 6. something (go) wrong with my watch. 7. i already (translate) these sentences into french. 8. she (work) much and usually (get) many good marks. 9. we (buy) a new tv set this year.

With the development of industrial cities that produce a huge amount of pollutants, the problem has become real.

If there was no such problem, then our planet was not in serious danger.

If not for global warming, acid rain, air and water pollution, then we did not have problems that threaten the lives of people on Earth.

If we treat our land with care, if we do not pollute it, then it can recover.

If we apply all our forces to this, there will be clean air and fertile land and there will be no environmental threat.

Объяснение:

l

1 am reading

2 are playing

3 is cleaning

is swimming

5 is speaking

6 are waiting

7 are doing

8 is snowing

9 are riding

10 is explaining

ll

Am i reading this book for 3 days?

Are we playing volleyball for 20min?

Is she cleaning the flat for more than an hour?

Is Peter swimming for half an hour?

Is Ann speaking on the phone for an hour?

Are you waiting for a bus for 10min?

Are Nelly and Mary doing the shopping since early morning?

Is it snowing since last night

Are Jack and his friend ridding bikes for 3 hours now?

Is the teacher explaining a grammar rule since the beginning of the lesson?

Объяснение: