A.Who | B.What | C.Where |
A.to; on | B.to; in | C.for; on |
A.—What's this? —It's a stamp. B.—What are you doing? —I'm writing a letter. C.—What do you want to do? —I want to send a letter. D.—How to write a postcard? —Write the date first. E.—Are you okay? —No. I miss my parents. |