Fill in the gaps

Choose the correct verbs to complete the sentences with perfect infinitive.

• Take
• switch
• tell
• cook
• have
• be.

1. He didn't notice a very important message. He should
   [ ]
   off his mobile.
2. She could
   [ ]
   me about her allergy! Why didn't she do it?
3. Look! They are so worried! They might
   [ ]
   some troubles.
4. Our friends haven't arrived yet. They could
   [ ]
   the wrong turn.
5. Sue should
   [ ]
   something different. Her friend doesn't like apple pies.
6. Jack couldn't
   [ ]
   ill. I saw him at school yesterday.