Афанасьева, Михеева, Баранова, 7. Учебник. Unit 5. Step 5

1) true;
2) false;
3) true;
4) true;
5) not stated;
6) true;
7) false;
8) true;
9) not stated.

1) dangerous;
2) factories;
3) pollute;
4) polluted;
5) pour;
6) waste;
7) earth;
8) polluted;
9) dump;
10) waste;
11) healthy;
12) ecological.

A.
1e, 2c, 3d, 4f, 5b, a — extra.

1) has been snowing;
2) haven’t seen you, what have you been doing;
3) have written, haven’t got any answer;
4) has been here;
5) I have met;
6) you have already missed;
7) I have been phoning;
8) I have been working, haven’t finished;
9) I have always wanted;
10) has been ringing;
11) haven’t had;
12) have been building.

1d, 2c, 3f, 4a, 5h, 6g, 7b, 8e.

1) have been writing, have finished;
2) haven’t met;
3) have been learning;
4) haven’t seen;
5) has lived/has been living;
6) have never spoken;
7) has been waiting;
8) have read;
9) have been growing;
10) has worked/has been working.