Burning all the lights in the classroom will be a great______ on electric power.
2. Why did Jane go to Africa to study chimps in the wild? Because she wanted .
II. Choose the correct answers after reading the passage. 1.What did the group do first in the morning? They .
20. The American Civil War lasted four years the North won in the end.
19. into use in April. 2000, the hotline was meant for residents reporting water and heating supply breakdowns
18. As soon as he comes back, I’ll tell him when and see him.