请你从A、B、C三个选项中选出能够填入空白处的最恰当的选项,然后把代表该答案的字母写在方框内。
21. -___________________?
-How do you do?
A. How are you
B. What do you do
C. How do you do
22. -Is this your son’s ID?
-Oh, that’s it! Thank you very much.
21. -___________________?
-How do you do?
A. How are you
B. What do you do
C. How do you do
22. -Is this your son’s ID?
-Oh, that’s it! Thank you very much.

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