1) 1-imaginary; 2-past simple, would, could, might; 3-would; 4-can
2) 2-e; 3-a; 4-f; 5-c; 6-d
<span>1. </span>is expected
<span>2. </span>are given
<span>3. </span>is reported
<span>4. </span>is known
<span>5. </span>is thought
1) Dirtier
2) dirtier
3) longer
4) difficult
5) better
6) slightly difficult
7)more difficult