Read and choose the Chinese meaning.（请你选出下列句子的汉语译文)
( )1. The Changjiang River is longer than the Yellow River.
( )2. Polly's hair is shorter than Molly's hair.
( )3. The Great Wall is older than the Summer Palace.
( )4. Beijing is bigger than Tianjin.A.长城比颐和园更古老。
B．北京比天津大。
C．波丽的头发比莫利的短。
D．长江比黄河长。