II, Change these sentences into active voice:
1, This tree was planted by my grandfather.
2, A lot of work is done every day by us.
3. The rubbish was collected yesterday evening.
4, Many trees are cut down to make paper.
5, English is considered the most international language.
6, A new school will be built very soon by them?
7, These doors should be shut before 5 p.m.
8, I was given a pretty painting on Chrismas by Nam.
9, Is recycled paper used by us ?
10, Many lakes and rivers were destroyed by pollution.
11, The time machine will be shown to the public.
12, Old car tires are recycled to make shoes and sandals.