6课后巩固提升第Ⅱ题答案
7课后巩固提升第Ⅲ题答案
1. clocks
2. to go
3. had rung
4. Have; forgotten
5. dressed
8课后巩固提升第Ⅳ题答案
1. invited me to
2. has changed
3. empty; nothing
4. on April Fool's Day
9课后巩固提升第Ⅴ题答案