IV. 1. were planting
2. has changed
3. reading
4. to smoke
V. 1. actors
2. talkative
3. carelessly
4. pollution
VI. 1. C
2. C
3. B
4. A
VII. 1. Because a voice called "Mr Lennon".
2. The killer threw his gun down, and stood there smiling.
3. Yes, he was.
4. Chapman came from Hawaii.