Ex1:
1.B 2.A 3.C
Ex2:
1.D 2.C 3.D
Ex3:
1.D 2.C 3.D 4.A
Ex4:
1.sudies
2.doesn't hurry
3.will pass
4.will be
5.gives
6.won't pass
7.doesn't stop
8.is
Ex5:
1.A
2.B
3.D
4.A
5.D
6.C
7.D
8.D
9.C
10.B
Ex6:
2.If there weren't so many billboards in our country,people could enjoy the view.
3.If there wasn't so much light in the city at night, we could see the stars clearly.
4.If we don't turn on the heater all the time,we won't have to pay three million dong for electricity a month
5.If the karaoke bar don't make so much noise almost every night, the residents won't complain to its owner.
6.If she doesn't work in a noisy office,she won't has a headache after work every day.
