1) The central character of the play is a scientist who is working at a difficult problem.
2) My friend wondered why I hadn't phoned him.
3) My parents and I love to receive friends in our house.
4) If you can't find your seat in the theatre , ask an usher to help you.
5) Our seats were in the gallery, rather far from the stage.
6) Hold on a minute, I'm nearly ready.
7) My friend is very much like me: we both like the same things.
8) The scenery of the play was fantastic.
9) When I told farher about my problem, he willingly offered his help.
10) He couldn't decide what to do for a long time and in the end became a music teacher.
№1
1) B
2) A
3)С
4)A
5)A
6)C
7)A
8)C
№2
1)needn`t
2)mustn`t
3)May
4)shall
5)may
6)aught to
7)could
8)should