根据句子意思选出正确的单词。
How long  How old   How far   How much   How many 
1.—________ is it from Beijing to Tianjin?—It's about 125 kilometres.   
2.—________ is your mother?—She is forty years old.   
3.—________ is the Great Wall?—It's about 6000 kilometres.   
4.—________ students are there?—There are forty-­five.   
5.—________ is this book?—It's five yuan.

--- is your birthday? (   )
---It's on 3rd March.

A．When

B．How

C．Which

________ do you go to the zoo? (　　)

A．What

B．How

C．Where

— ________ is Danny? (   )
—She is beside the chair.

A．Who

B．Where

C．What

D．Whose

 is it?  It’s seven o’clock. (  )

A．How much

B．How many

C．What time