Not only his parents but also his brother ________ to the Summer Palace. They haven't been back.
The foreigners are ______ by the ________ progress that the Chinese have made.
The summer holidays are not far away _________ we can stay at home and read some good books.
The classroom can ________ 50 students.
Football, ________ is an interesting game, is played all over the world.
He _______ two elder brothers and a younger sister.