9. A. ask
10. B. natural
1. My house is bigger than your house
. =>Your house …is smaller than mine………..
2. The black car is cheaper than the red one
The red car …is more expensive than the black one………
3. We will plant more trees. The air will be fresher.
If .....we plant more trees, the air will be fresher.............
4. We will use fewer cars. We will reduce pollution
If ......we use fewer cars, we will reduce pollution........................
5. We cycle to school every day. We keep fitter.
If ......... we cycle to school everyday, we will keep fitter......................
CHÚC BN HỌC TỐT!NHỚ VOTE 5* VÀ CTLHN CHO MIK NHOA!