ex2:
cột 1:coin,oil,boy,nosy,toy
cột 2:town,cloud,noun,shout,house
ex8:
1.they plan to make this beach...
2.the students have collected old clothes for...
3.if we use the car all the time, we will make the air dirty
4.unless I leave now, i'll miss my train
5.if idon't have a quiet room,i won't be able to do anything