loading10. exist
II. 1. violent 2. fundamental 3. harmful 4. puzzled; puzzle 5. lying; lied; laid; laid; lie III. 1. to 4. of
2. on; in
5. from
3. out; in
IV. 1. escape from 2. lays eggs 3. cool down
4. depend on
5. as a result of 6. in time V.
1. prevent the poisonous gases from polluting the air 2. gave birth to
3. whether or not
4. in time for the teacher to correct 5. in their children’s turn Part 2
I. 1. Biology 2. gravity 4. crashed 5. climate
II. 1. Cultural 2. physicist 3. unfair 4. confidence 5. gently III. 1. Who
2. That
3. that 3. satellite
4. What 5. Whether 6. that Part 3
I. 1. have a chance 2. make a trip 3. get close to 4. as if
5. get the hang of 6. block out 7. float 8. Cheer up II. 1. explain 后加to 2. exhausted改成 exhausting 3. amazing改成amazed
4. excited改成exciting 5. frightened改成frightening 6. widen改成widens 7. pull改成pulling III.
1. The couple looked unhappy for a quarrel broke out between them last night. 2. Watch out for wild animals when you go up the hills. 3. You ought to have a good rest now that you’ve finished the work.