别人见到你的书包还给你，你应该说：
A. OK.
B. Not at all.
C. Thank you.
你不知道这条围巾是谁的，你应该问：
A. Whose scarf is that?
B. Whose scarf is this?
C. Whose scarf is it?
你不知道这个图形里有几个圆，你会问：
A. How many circles are there?
B. How many squares are there?
C. How many triangles are there?.
你想知道远处的东西是什么，应该问：
A. What’s this?
B. What’s it?
C. What’s that?
跟别人初次见面，应该说：
A. How are you?
B. Nice to meet you.
C. How do you do?