2.Grammar. The usa is a multicultural country. Paul and his friends celebrated International Day at his school.
Some pupils were showing folk dances from countries all over the world.
(0) What dances /they/perform? what dances were they performing?
(1)they /wear/tational costumes? . Some pupils were singing songs.
(2) What songs / they/sing
(3) What food /the children /eat?
(4) anyone /eat/traditional Russian food?

(1) Were they wearing national costumes?Some pupils were singing songs. (2) What songs were they singing? (3) What food were the children eating? (4) Was anyone eating traditional Russian food?