1分.

1.yes.
2.no.
3.second yes.
4.no.
5.second yes.
6.third yes.
7.no
8.first yes.
9.third yes.
10.second yes.
11.third yes.
12.third yes.
13.third yes.
14.none.
15.first yes.
16.first yes.
17.third yes.
18.first yes.
19.none.
20.none.