II. Choose the best answer A, B, C or D to complete the sentences. (2 pts)

1. To save money, we learn to _______ some daily products like coca cola bottles.

A. keep B. reuse C. produce D. create

2. In the green future, vehicles _______ by solar energy.

A. will power B. will be C. will be powered D. power

3. Clean water______ is through pipes is called piped water.

A. that B. which C. it D. what

4. He suggested that they should _______ up smoking.

A. giving B. to give C. give D. gave

5. _______ I was so tired, I have to finish my homework.

A. Despite B. Because C. Although D. If