It is ___ the customers’ needs that has made chain stores so popular in big cities in China.

The boy cheated in the English examination so he deserved ________.

Studies have shown that children grow and develop quite normally on a diet ___ plenty of bread and vegetables with small amounts of milk and meat.

The graduation ceremony,_______ at 9 pm yesterday, was followed by a film ．

_____ to sunlight for too much time will do harm to one's skin.