Щас посмортим........................................................................................
c. Did the scientists solve two important problems last year?
1.didn't he?
2.hasn't he?
3.weren't you?
4.didn't you?
5.didn't he?
6.wasn't she?
7.haven't they?
8.didn't they?
9.don't you?
10.wasn't it?
11.haven't you?
12.isn't it?
13.do you?
14.doesn't he?
15.don't we?
16.will he?
17.could she?
18.shouldn't he?
19.can't you?
20.will you?
1.Did you watch,rang
2.saw,walked
3.wasn't sleeping,arrived
4.traveld,rememberd
5.the children were studying,was preparing