选词填空,完成下列对话,每词限用一次。
on    for   to    at    in
（1）—How many months are there________a year? —There are twelve.   
（2）—Do you often go________the cinema? —Yes, I do.   
（3）—What time do you go to school every day? —________eight o’clock.   
（4）—When is Children’s Day in China? —It's ________the first of June.   
（5）—What do you want________Children’s Day? —I want a new dress.

Whose birthday is ______ June? (  )

A．at

B．on

C．in

People ______ the US speak English.(   )

A．in

B．at

C．of

The bird is flying  the mountains. (  )

A．on

B．over

C．under

Why do you have cups _______ your heads? (   )

A．in

B．at

C．on