Thirty
.....................................
1) must
2)ought to
3)have to
4)must
5)should
6) mustn't
7)podymay
8)must
9) have to
10)must
2.
1. Did you go to school yesterday?
Yes, I did.
2. Do you go to schol every day?
Yes, I do.
3. Were you at school yesterday?
Yes, I was.
4. Was he at school last Friday?
Yes, he was.
5. Is there a stadium near the school?
Yes there is.
3.
1. Who did write the words?
2. Who was in Dmitrov?
3. Who does sing English songs?
4. Who has got a horse?
5. Who is ready?
I-am
He/she/it-is
They/we/you-are.