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A.I will do my homework.

B.I play football.

C.I'm reading books.

A.It's in the west of China.

B.It's in the north of China.

C.It's in the east of China.

A.How big is Harbin?

B.How long is Harbin?

C.How old is Harbin?

（____）It's more than twenty thousand kilometres long.

（____）Look! It's a picture of the Great Wall. Do you know it?

（____）It's in China.

（____）No, I don't. Tell me more about it. Where is the Great Wall?

（____）And how long is it?

A.isB.areC.do

—It's about 500 metres.　　

A.bigB.longC.fat

A.atB.inC.on

A.forB.withC.about

A.heB.himC.his