Choose the correct word.
1 Max was ill yesterday so he wasn't able to/ didn't have to go to work.
2 You might not/mustn't climb public buildings - it's illegal!
3 A redback spider must/can give its victims a nasty bite.
4 People with hay fever should/can keep their windows closed in the summer. 5 Tom mustn't/can't play football next week. He's broken his leg.
6 People who share mobile phones should/ might get skin infections.
7 If you sit in front of a laptop for too long, you may/have to get backache.
8 Alain Robert had to/could climb buildings from the age of twelve
. 9 You mustn't/don't have to go to the doctor for minor health problems. You can/must try a natural remedy! ​