20. The biggest prize of the
) the best film.
21. The festival (takes/takes place /occur/held every year at the end of August.
22. Everybody attends the festival (with/for /in/of) fun
23. On Thanksgiving, families and friends (meet/ arrive/gather/)appear) to have a feast.
24. At the moment, Nam (cycle/ cycles /is cycling/will be cycled) to school.
25. Many countries (use (will use will be using/will be used) Solar energy in the world in the
future.
27. (Renewable/Natural/Effective/Non-renewable source of energy is the source that can't be
replaced after use.
28. We are looking for cheap, clean and (effective/efficient /serious/ dangerous) sources of energ
29. We should use (low energy little energy/a bit energy/ efficient) light bulbs in our homes.
30. In my opinion, nuclear power is not only expensive but also (danger/dangerous/risk/disaster)
our environment.
31. Remember to (turn/turn off turn on/stop) the lights before going to bed.
32. They will build built/will be built / has built) A hydropower station in the North of the
country next year.
33. "Why is it called a (effective/specific renewable/non-renewable) source?" - "Because it can
replaced easily and quickly."
34. Look at the photo! You're (driving /flying riding going) a horse!
35. It's really difficult to (pedal/drive/ fly/sail) a bicycle up the hill.
36. (Mine/My/Me) keys are here on the table. Where are (our/yours/us)?
37. A sky safety system can help cars to (prevent/have/use/take) traffic jams and crashes.
39. The white cat is Helen's and the black cat is (my/L/mine/of mine).