Đáp án :

34 . The girl who lived next door to us is very friendly

35 . No matter what I do, my parents find fault with it

36 . Although Ba isn't very rich , he always helps the poor

37 . Unless someone puts the coal in , the fire will go out

38 . I suggest you should install a burglar alarm in your house

1. The girl is very friendly. She lived next door to us.

->The girl who lived next door to us is very friendly

2.My parents find fault with everything I do

=>No matter what I do my parents find fault with it.

 3.He isn't very rich but he always helps the poor.

-> Although he isn't very rich ,he always helps the poor.

4. If someone doesn’t put the coal in, the fire will go out.
Unless someone puts the coal in, the fire will go out.

5.Why don't you install a burglar alarm in your house?

→ I suggest you to install a burglar alarm in your house.