The key answer of exercise 12
The key to exercise solutions in chapter 2c - Grammar in use for the textbook On Screen B1+/B2 - Student's Book with authors Virginia Evans and Jenny Dooley from Express Publishing
Question
Complete the second sentence so that it means the same as the first. Use appropriate modal verbs.
Answer
- should / ought to protect endangered species
- don't have to / needn’t water the plants
- should turn off lights when you don’t need them
- mustn't drop litter in the street
- must / have to keep your dog on a short lead near farm animals
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