20.1
2.Yes, I started that
3.Yes, they arrived at 5 o'clock
4.Yes, she gone on Friday
5.Yes, I worn them yesterday
20.2
3.Right
4.Right
5.Right
6.Right
7.Wrong:had die
8.Wrong had you been
20.3
3.was playing
4.did you went
5.Had you ever met
6.is not
7.just washed
8.washed
9.has visited
10.did not came
20.4
1)
A. Did you have
B.was
2)
A.Did you
B.went
A. -
B. I did not saw
3)
is working, was, was warking, did not enjoy
4)
A.-
B.saw, never speak, have you ever speak
A.met