Раскройте скобки, употребляя глаголы в present perfect, past simple, past continuous, past perfect, future perfect:
1. i never (to be) to greece.
2. when you (to receive) a letter from your friend?
3. the builders (to finish) this building by next month.
4. look! what wonderful flowers she (to buy).
5. he (to learn) english before he (to go) to the usa.
6. they (to eat) all the apples which i (to bring).
7. when the children (to have) dinner, they (to go) for a walk.
8. at that time yesterday they (to sit) on the sofa and to listen) to their grandmother who (to tell) them fairy tales.
9. my friend just (to ring) me up from london.
10. i (to stand) at the bus stop when it (to begin) raining.