Раскройте скобки в страдательном залоге настоящего или настоящего завершенного времени.
1. We often (to invite) to a concert.
2. Many houses (to build) in our town last year.
3. Letters just (to post) by her.
4. Hockey (to play) in winter.
5. A lot of animals (to kill) every year.
6. The books already (to take) back to the library.