根据图片，补全对话。(20分)
( )（1）
—Good morning!
—________
A．Good morning!
B．Goodbye!
( )（2）
—Hello，________．
—Hi!
A．boys B．girls
( )（3）
—How are you?
—________
A．Whoops！I'm not fine.
B．I'm fine.
( )（4）
—Goodbye.
—________
A．Bye. B．Thank you.
How can I_____the library?
A. gets to B. get C. get to
I'm going to Beijing ________ the National Holiday.
A．inB．onC．at
What ________ they going to do tomorrow?
A．beB．areC．is
—________ are you going?
—This afternoon.
A．WhatB．WhereC．When
I want to buy ________ shoes.
A．a pair ofB．pair ofC．two pair of