2. Complete these sentences with the words given in exercise 1.
1. Amphibious buses can run on water … land.
2. Fossil fuels help run machines, … they cause pollution.
3. … solar energy is unlimited, not many people can cover its expense.
4. People should limit hydropower plants … they sometimes cause terrible floods.
5. This seaside is full of sunlight, … they will establish a solar power plant here.
6. Either solar energy … wind power is useful and helps protect the environment.
Bài Làm:
1. and
2. but
3. Although
4. because
5. so
6. or