1. Розкрийте дужки, ставлячи дієслова у правильному часі

(Present Perfect або Past Perfect).

1. My sister is so upset: she (to lose) the key to the front door.

2. By the 1st of September all the children (to return) from the country.

3. Columbus (not to know) that he (to discover) America.

4. He (to discuss) this problem with a lot of people before he (to take decision).
5. I never (to be) to Greece.
6. She is very happy: her son (to finish) school.
7. I (not to dance) for ages.