<span>Are he and his sister doctors?</span>
"Catch" стоит в первой форме. В форме прошедшего времени (во второй форме) этот глагол будет звучать как "caught".
We had a most enjoyable evening
1 e
2 i
3 a
4 h
5 j
6 b
7 f
8 c
9 d
10 g
Is,do you understand,what is going on,had been studying ,realized ,was,what time is the next plane leaving