EX 1
1. Lan can sing very well . She can't play piano (combine these sentences with although )
2. we use the cars all the time .we make the air dirty (''If'')
3.It the soil (be)_ polluted , the vegetales (die)_(chia động từ)
4 This is(interesting )_ book that I have ever read(so sánh hơn nhất)
5. The cars/ will /fly/be able to/ in the future (sắp xếp)
6.The will a new school in this area next year ( câu bị động)