Điền vào chỗ chấm:
1)The Mekong River is long. The Amazon River is....... than the Mekong. The Nile is........... river in the world.
2)The Great Wall of China is long. It is ............. structure in the world.
3)Sears Tower in Chicago is tall, but it isn’t ............. building in the world.PETRONAS Twin Towers in Kuala Lumpur is ........... than Sears Tower .It is ............building in the world.
4)Ha Noi is big, it is not the .......... city in Viet Nam.Ho Chi Minh City is............ than Ha Noi.It is ............. city in Viet Nam. But Mexico City is .......... city in the world.