8. You .................... not cross the road when the trafic light is red. It's dangerous. A. must B. can't C. shouldn't D. should

5. People often think Santa Claus and pine trees are the .................... of Christmas. A. symbols B. performance C. parade D. decorations

10. Scotland is famous for its .................... castles, historical sights and amazing scenery. A. old-fashioned B. powerful C. driverless D. ancient

3. The future vehicles may run faster, cost cheaper and be more .................. A. economy B. economical C. economic D. econimically

14. Yesterday, Tom .................. his finger when he sliced the bread. He lost a lot of blood. A. cuffed B. didn't cut C. was cutting D. cut

11. I'm afraid I .................... able to attend your workshop tomorrow. A. isn't B. won't be C. wasn't D. weren't

7. While I .................... my homework, my sister .................... newspapers. A. are doing/ is reading B. am doing/ are reading C. is doing/ are reading D. am doing/ is reading

4. At the moment, scientists ................ to generate electricity from alternative energy sources with the lowest cost. A. are trying B. is trying C. will try

9. Not many people went to see the film; ...................., it received good reviews from critics. A. but B. because C. however D. although

1. A .................. is a device that converts sunlight into electricity. A. solar panel B. solar energy C. solar system D. solar power

2. Which ............... of transport do you think will be used in the future? A. mean B. means C. meaning D. meanings

16. When the energy comes from water, we call it .................. energy A. solar B. hydro C. natural D. wave