Cover of the textbook On Screen B1+/B2 - Student's Book

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

  1. should / ought to protect endangered species
  2. don't have to / needn’t water the plants
  3. should turn off lights when you don’t need them
  4. mustn't drop litter in the street
  5. must / have to keep your dog on a short lead near farm animals