比一比，说说它们之间有什么不同。
目是全封闭结构，月是半封闭结构
现有空气、氧气、二氧化碳的三瓶气体，最简单的区别方法是( )
⑴Can you put up the Christmas tree? ____
⑵We are going to write Christmas cards to our friends. ____
⑶Santa is a merry man in red clothes. ____
⑷It's a Chinese lantern for you. ____
⑸This morning we open the gifts! ____
A. B. C. D. E.
B. 
C. 
D. 
E. 
