Cover of the textbook Focus 5 - Student's Book

The key answer of exercise 4

The key to exercise solutions in chapter Review 4 for the textbook Focus 5 - Student's Book with authors Vaughan Jones and Sue Kay from Pearson Education


Write sentences from the prompts. Use the correct forms of the infinitive.


  1. You shouldn’t have chosen / shouldn’t choose to buy the cheapest tablet.
  2. She refused / refuses to let me work on my laptop during take-off.
  3. We (have) made the decision not to enter the website design competition.
  4. It's extremely important to protect your log-in details.
  5. You're the second person to tell me it's broken this morning.
  6. Turn your computer off when not in use to ensure it does not overheat.