Раскройте скобки. (past simple or present perfect) 1. helen (to invite) her classmates to her home last monday. they had a good time together. 2. … you (to buy) any christmas present? - not yet. 3. tom (to be) already to the library. he is reading a very interesting book. 4. alice (to collect) english and german coins last year. 5. i (to do) my homework. i can go out with my friends.