Ⅰ、1、Maybe
2、money
3、problem
4、deal
5、work
6、elder
7、offer
8、explain
9、Whatever
10、nervous
Ⅱ、wrong / up , looking , back, angry, guess / think, advice / help, out
Ⅲ、1、must / should stop , can go
2、should / must call 119
3、mustn't / shouldn't take photos
4、shouldn't / mustn't park cars there
5、shouldn't / mustn't smoke