1. was built
2. was sent
3. is played
4. was received
5. will be done
1. aren't they?
2. doesn't she?
3. isn't it?
4. isn't it?
5. haven't they?
1. are said
2. are believed
3. are thought
4. are considered
5. are said
1. should
2. needn't
3. needn't
4. should
5. wasn't able
1.b
2.b
3.b
4.a
5.b
6.c
7.c
8.b
9.a
10.b
choose - chose - chosen
come - came - come
eat - ate - eaten
find - found - found
give - gave - given
learn - learnt - learnt
keep - kept - kept
lose - lost - lost
do - did - done
take - took - taken