For most informal dinners，you should wear comfortable，______ clothes

We all know that Yangtze River is longer than ________ in China.

_________ English can be difficult to learn, it is a very useful tool for communication.

My mother says that we won’t go on a trip to Hong Kong.—- _________. You were looking forward to it.

The number of the students of Xicheng Secondary School is much_________than_______school in Taixing City.