1. The panda’s natural (A. habitat/ B. ecosystem/ C. species/ D. pollution) is the bamboo forest
2. This forest provides a habitat for hundreds of (classes/ species/ groups/ styles) of plants and animals.
3. (A. Protecting/ B. Destroying/ C. Polluting/ D. Preventing) the environment must be the job of everyone in the community
4. Students should learn some practical ways that help to (protect/ save/ recycle/ reduce) pollution.
5. (A. Before/ B. After/ C. Until/ D. Till) she left the party, Jenny said goodbye to the host.
6. People think that global warming (causing/ cause/ causes/ will cause) lots of problems in the future.
7. We should (A. reduce/ B. increase/ C. plant/ D. build) the consumption of single-use products like plastic bottles and bags.
8. (A. Planting/ B. Cutting down/ C. Watering/ D. Picking up) trees and burning forests destroy a lot of wildlife habitats.
9. We saw many beautiful birds while we(A. fish/ B. fished/ C. are fishing/ D. were fishing) in the lake.
10. Public education is probably the most important activity in wildlife (A. conservation/ B. pollution/
11. destruction/ D. eruption) .
12. What do shopping centres (never/ usually/ rarely/ seldom) offer customers on special occasions?- Mostly sales and entertainment.

1.I (am sometimes/ sometimes am/ are sometimes/ sometimes are) bored in the maths lessons.

1. (A. While/ B. As soon as/ C. When/ D. During) he heard the warning of the tornado, he went searching for his children.
2. They were searching for information for their project (A. while/ B. when/ C. till/ D. after) their parents were gardening.
3. I had no idea about the dangers of tsunami (A. as soon as/ B. while/ C. until/ D. after) I saw the film.
4. The tourists cleared up the beach (A. after/ B. before/ C. while/ D. till)  they got back to the hotel.