Ex 1
1.When
2.in case
3.since
4.unless
5.before
6.Although
Ex 2
1+D 2+A 3+E 4+B 5+D 6+C
Ex 3
1.had left 2.knew 3.go 4.to do
5.had gone 6.biggest 7.illness 8.turned down
Ex 4
1.whose->who 2.is->was
Ex 5
1.She asked me if I would go with her father the following week.
2.It is said that he lives abroad.
3.I wish I had a computer now.
4.Ling in the countryside is much cheaper than living in the city.
