Ex4. Complete the sentences with the words below. Use the same word in each pair of
sentences.
exercise        hard              level            light
record           rest                 show           work

1. a. Usain Bolt set a new world ____________________ at the Olympic Games.
b. You can ____________________ a message for someone to listen to later.
2. a. Look at ____________________ 3 on page 78.
b. You need to ____________________ to stay fit.
3. a. This MP3 player doesn't ____________________ broken. It’s broken.
b Does your mum ____________________ at the hospital?
4. a. There's a great quiz ____________________ on TV tonight.
b. Can you ____________________ me the way to the library?
5. a. I'm exhausted. I need a ____________________!
b. How will you spend the ____________________ of the day?
6. a. I couldn't sleep because my bed was too ____________________.
b. If I think ____________________, I'm sure I'll work out the answer.
7. a. It's getting dark. Switch on the ____________________ .
b. This suitcase is quite ____________________ - only 6kg.
8. a. There is a worryingly high ____________________ of CO2 in the atmosphere.
b. The shelf isn't ____________________ so the books might fall off.