1.a B,C D G J K P Q T U V W Y Z （14个）
2.an A、E、F,L,M ,N,R,S,X,H,I、O （12个）
3.Grass is green.
The sky is blue.
There are many red flowers in the garden.
I like white dresses very much.
Bananas are yellow.I like them.
搞定了.