They _ the train until it disappeared in the distance.
— Which do young people prefer, music or sports?— Both. Music is ________ sports.
China’s Got Talent is ________ interesting ________ many people like watching it.
Last year, three hundred English teachers took part in the _______ English Training.
The red skirt ________ my mother bought for me is made of cotton.
Jenny’s uncle is a scientist. She is proud ________ him.