Page I
Pages 4-5
I. 1. C 2. D 3. B 4. A
III. 1. if 2. close 3. lively 4. at once
5. role model 6. respect 7. host 8. worried
Page 6
I. 1. dig 2. Looking 3. heavy 4. give
III. 1. up 2. dig 3. spend 4. just 5. chance
6. underground
Page II
任务型阅读：
1. rules 2. They used horses to pull their buses.
3. They made their prices lower. 4. routes
5. In the 1900s.
6. 它们不同于今天的大型公共汽车，看起来更像那些没有马的旧马车。
7. The red color.
Page III
Comprehension test: 1-3 CBC
Vocabulary in use:
1. falls on 2. play tricks 3. make fun of
Page IV
Day 1: ACBD
Day 2: 1. They spent 30 years on it.
2. He used 105 cows.
3. Because he dreamed his father was sick.
4. He was moved to tears.
Day 3: ADAB
Day 4: ADBCB
Day 5: 1-5 DBADD 6-10 BCCBB
