1) False
2) True
3) True
4) False
5) Were; Yes, I was
6) Was; No, he wasn't. He was studing English
7) Were; No, they weren't. They were reading books
8) Did Paul call
9) Called
10) Was having
11) Were you driving
12) Stopped
13) Didn't drive
14) released
15) attend
16) served
17) horror
18) audience