I took part in the gymnastics group when I was at school．

She studies English in order to study abroad．

In extreme old age, people often lose their memories．

Parents are always anxious for their children’s safety when the children are out．

The footprint left in the room were important clues for the police．

The two brothers differ from each other in their tastes．

They worked for extra hours and got more pay．

What is the altitude of this small village?

The maximum number of students in each class is thirty．

The hotel can provide accommodations for 500 guests．