N3.

1. Present Simple

2. Present Perfect

3. Present Continuous

4. Past Continuous

5. Present Perfect

N5.

1. Passive

2. Active

3. Passive

4. Passive

5. Active

N..

1. Two hundred people were arrested by the police

2. Every car engine is checked by us throughly

3.Two million books are sent to America every year

4. All the letters were posted yesterday

5. ?? (не видно, как там надо начинать, но, наверное, Bread is wrapped by machine automatically)