V.
1.Students should turn off the lights before leaving class.
2.Children are very interested in robots.
3.My house will have a beautiful sea view.
4.If the river is polluted, the fish will die.
5.Tokyo is one of the world's most crowed and biggest cities.
6.The seafood in Quy Nhon is cheap and delicious.
7.Tomorrow, we are going on a trip along the Huong river.
8.Our future houses will use energy from the sun.
9.If you produce rubbish, you will burn harmful smoke.
10.Today, robots aren't very popular because they are too expensive.
VI.
1.Badminton is Minh's favourite sport.
2.Pele began his career when he was fifteen years old.
3.Although plastic bags cause pollution, people still use them
VII.
1.didn't start
2.have never seen
3.has been
4.cycles
