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

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

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

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

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

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

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

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

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

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

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

6. "Why is it called a .................... source?" - "Because it can be replaced easily and quickly." A. non-renewable B. effective C. renewable D. specific