Cevap:
2. a) It is thought(?) that we use a small percentage of our brain power.
b) We use a small percentage of our brain power.
3. a) It is claimed(?) that we remember things we hear in our sleep.
b) we remember things we hear in our sleep.
4. a) it is believed that solving puzzles keeps the brain active
b) solving puzzles keeps the brain active.
5. a) it is proved that little exercise is good for our concentration
b) exercise is good for our concentration.
6. a) it is said that exams are disastrous
b) the exams is disastrous
5. a) it is known that the sun shines itself
b) the sun shines itself
8. a) it is said that the exercise wasn't easy.
b) the exercise wasn't easy.
