От
Поставьте глаголы в скобках в правильную форму
1)Kate rang the doorbell, but nobody answered. Then she tried (knock) on the door, but there was still nothing.
2)A baby tried (reach) the toy on the table, but he wasn't tall enough.
3)Could you leave my room for some time? I'm trying (concentrate).
knocks
reachs
concentrate