________ all the pictures , I think that one ________.

[　　]

________ our eyes, we can see more than ________ stars on a clear night.

[　　]

Chinese is ________ language to learn. Students must work hard at it.

[　　]

The Great Green Wall is ________ and ________.

[　　]

A．long 7,000km, wide 400 and 1, 700 km.

B．7 , 000 km. long, 400 and 1, 700 km . wide

C．long 7 ,000km, wide between 400 and 1, 700 km.

D．7 , 000 km . long , between 400 and 1, 700 km . wide

We get to know that it' s important ________ us ________ plant more trees .

[　　]

Why should trees ________ on the mountains ?

[　　]

The river smells terrible. People must ________ dirty things into it.

[　　]

The woman ________ blue is Li Hua's mother.

[　　]

The water must be ________ too hot ________ too cold.

[　　]

Neither you nor she ________ hard at English.

[　　]