Why does the author smile at the beginning of the story?
A、He will get a gift.
B、He will shoot a model rocket.
C、He has received a pleasant letter.
D、He has heard some good news.
4.
A、hour
B、hello
C、hurt
D、here
A.Thank you.B.Here you are.C. Good morning.D.Where are you from?E.How's everything with you?F.Why do you come to China?G.How long will you stay in China?