Here are the suggested answers for the blanks:

**III. Fill in the blank with one suitable PREPOSITION or ADVERB:**
1. You look tired. Sit **down** and have a cup of tea.
2. I’m looking **through** yesterday’s newspapers. Did you throw it **away**?
3. Could I try **on** these shoes, please? Size nine.
4. Turn **down** the music. It’s too loud!
5. I turned **on** the radio and listened to the six o’clock news.

**IV. Give the correct form of the word in CAPITALS to complete each of the following sentences:**
1. We should read this leaflet to see what **ACTIVITIES** are organized during the festival. (ACT)
2. They showed me a marble sculpture which was **SKILLED** made by hand. (SKILL)
3. I think Tom and Mary have known each other since their **CHILDHOOD**. (CHILD)
4. My brother feels **RELAXED** when he’s playing the guitar. (RELAX)
5. Lan was upset because her parents **DIDN'T UNDERSTAND** her. (UNDERSTAND)