3a that sounds great

4c sorry. I'm too tired

1.1 minh told nam that he would join in english club the following week

2 she said that she didn't speak Italian

3 john said that he loved that town

4 tom said that he would buy some flowers the next day

5 Ann said she must/ had to go for a job interview the following day

6 mary said that she had eaten a big hambuger the day before

7 he said that he had once spent a summer there in that province

8 the pupils said that they would be sitting for them exams the next friday

2.1 if there were any truth in her allegations I would resign

2 if I knew enough about the machine I could mend it myself

3 if I knew how difficult it was I wouldn't take the job

4 if susan went to the party she could join a dancing club

5 if it weren't so crowded I wouldn't take the bus to work every morning

3.1 the photograph was invented by thomas edison in 1877

2 two children were found  in the forest by the police

3 the patients were examined by the doctor yesterday

4 a pop song was sung very beautifully

5 this conversation was built by conversationists in 1990

6 the prize wasn't won by tim