II. Choose the best answer A, B, C or D to complete each sentence.
1. Nuclear energy can provide electricity for the world needs, but it is __________
A. cheap B. unlimited C. dangerous D. safe
2. You can ___________easily on the Dead Sea. Why? – Because it’s so salty
A. fly B. walk C. drive D. float
3. Biogas helps solve the problem of indoor ___________.
A. noise pollution B. air pollution C. water pollution D. soil pollution
4. __________ the silly story, many people enjoyed the film
A. In spite of B. Although C. However D. Nevertheless
5. Nuclear power__________ in the future.
A. will replace B. replace C. will be replaced D. replaces