1. In Vietnam, there are _______________ motorbikes today than 10 years ago
2. There were ____________ cars on the roads twenty years ago.
3. Small towns have ___________ traffic and pollution than big cities.
4. China is still the most populated, but India will have ________________ people than China by 2022.
5. Because there is ____________ crime in the countryside, crime is not a problem for people living