补全句子。Read and complete.
1. In summer, I like to sit _________ (太阳下).   
2. I like to _________ (拉小提琴).   
3. _________ (多久) do you play the erhu? Once a week.

I’m very interested_____art. ( )

A．in

B．at

C．on

—  the pandas.   (    )  
—They are cute and fat.

A．Look at

B．Look

C．Do you like

填空题。
【小题1】Mon.  
It will __________ on Monday. Lingling is going to __________.
【小题2】Sat.  
It will __________ __________ on Saturday. I'm going to __________.
【小题3】Tue.  
It will __________ __________ on Tuesday. I'm going to __________.
【小题4】A: Are you going to get a haircut?
B: No, I'm going to __________.
【小题5】Sam will __________ (become) a teacher in the future.

I often write_______my grandpa in China.   （ ）

A．in

B．on

C．to