（ ）早上，你遇到怀特老师，你应该对他说：
A. Good morning , Miss White.
B. Goodbye , Miss White.
C. Good morning , Mr White.
I walked ____ Mike’s home in the morning.
A. for B. to C. in
John went to the park ____ bike yesterday.
A. with B. by C. on
—What are you doing now ? —I am ____ pictures.
A. draw B. drawing C. drew
ZhangPeng ____ his homework now.
A. did B. does C. is doing
I was very grateful ____ the dog.
A. with B. for C. to