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（题文）阅读理解。
Jim: Hi, Bob!
Bob: Hello, Jim! What are you doing now?
Jim: I am writing an email on the computer. What about you?
Bob: I am writing a postcard. I want to send it to Steven. He is in Canada now.
Jim: May I see your postcard?
Bob: Sure! Here you are.
Jim: It is very beautiful. It has a picture of the Great Wall on it.
Bob: Steven likes the Great Wall very much.
Jim: Oh, I want to buy a postcard for my friend Betty. She likes the Palace Museum. How much is your postcard?
Bob: It is three yuan. Let’s go to the shop to buy some postcards. After we write them, we can send them at the post office.
Jim: Okay. Let’s go!
1. Jim is ________. (　　)
A. writing an email　　　　　  B. writing a letter
C. writing a postcard
2. What is Bob doing now? (　　)
A. He is writing an email.       B. He is writing a letter.
C. He is writing a postcard.
3. Bob’s postcard has a picture of ________. (　　)
A. the Great Wall             B. the Palace Museum
C. Tian’anmen Square
4. How much is Bob’s postcard? (　　)
A. It is two yuan.             B. It is three yuan.
C. It is four yuan.
5. They will go to ________ to buy some postcards. (　　)
A. the library                B. the park
C. the shop