вставить нужную форму глагола to be. Всего 10 предложений. ​

1) Mathematics is very difficult.
2) Our football team are winners. (можно также сказать is a winner)
3) There are many monkeys in the tree.
4) The dishes are on the table.
5) My teeth are yellow.
6) How many women are there in your company?
7) Have my shirts been washed yet?
8) Not many cities are clean and safe.
9) There are many problems in these exercises.
10) There are six libraries in our school.