气体交换的场所是( )
A:肺
B:咽和喉
C:气管和支气管
D:鼻腔
tall he is now! But last year he was and thin.
(____)He wants to play baseball.
(____)Tim was so happy because he got a gift.
(____)Why are you wearing a Tshirt?
(____)I am going to the cinema tomorrow.
(____)It's difficult to fly a kite.