p. 127 ex. 4. b) 1. Michael has been off school for a month.
2. He fell off his bike.
3. He had stayed at the hospital for three days.
5. He was bored.
6. He had done 150 word puzzles.
7. He advised to be careful while riding a bike or doing other things.
p. 127 ex. 5. The most difficult thing for Kate was to make her ill little sister take the medicines the doctor had prescribed.