The Changjiang River is one of________in the world．

A．the longer river

B．the longer rivers

C．the longest rivers

D．the longest river

The Caspian Sea is 1，025 meters________．

A．low

B．deeply

C．deep

D．high

Jinan is bigger than________in Shandong．

A．all the cities

B．any city

C．any other city

D．some cities

China has________population in the world．

A．the bigger

B．the biggest

C．the more

D．the most

—________is the population of the city？

—About one million．

A．What

B．How many

C．How

D．How much

One fifth of the population in that country________from China．

A．is

B．are

C．am

D．be

Please write as________as you can．

A．careful

B．care

C．carefully

D．more careful

The main reason is________endangered animals．

A．to protect

B．protect

C．to protecting

D．protects

Qomolangma is very dangerous________．

A．climbing

B．to climbing

C．climb

D．to climb

The first student________to school is Li Lin．

A．to get

B．gets

C．to getting

D．getting