поставить глагол to be
Mathematics ... very difficult.
Our football team ... winners.
There ... many birds in the tree.
The dishes ... on the table.
My teeth ... white.

team -1 команда значит is !!!!!!!!!

IsIsAreAre Are ...,,,,.......

Mathematics is very difficultOur football team are winnersThere are many birds in the treeThe dishes are on the tableMy teeth are white