`⇒`

`14.` I suggest that they shouldn't use electricity to cath fish.

`15 .`I suggest you should chang your pipes

`16`. I suggest you should watch tv for recreation 

`17.` I suggest they shouldn't use many ordinary 100 watt light bulbs

`18.` I suggest that he should go to the dentist.

`19.` I suggest that he shouldn't go to Australia for studying.

`20.` I suggest they shouldn't use too much coal,gas and oil.

`21.` She wasn’t beautiful but she took part in a beauty contest

`22.` Since It was raining,we decided to postpone our camping.

`23.` She suggests they sing a song

`24.` As she was illness,she couldn't come to class

`25.` She was busy, so she couldn’t join us

14 that they shouldn't use electricity to catch fish
15 you have a plumber fix them
16 you should watch tv for recreation 
17 they shouldn't use many ordinary 100 watt light bulbs
18 that he should go to the dentist
19 that he shouldn't go to Australia for studying
20 they shouldn't use too much coal, gas, and oil
21 she took part in a beauty contest?
22 it was raining, we decided to postpone our camping
23 they sing a song
24 she was ill, she couldn't come to class
25 she couldn't join us