题目：
口语应用：在下列横线上填入适当的话语，使对话完整、正确。
A: May I come in?
B: Come in, please. I'm in the study.
A: Hi, Susan.
B: Hi, James.
A: 1._____________________?
B: I'm looking at the photos!
A: Yes? Can you show them to me?
B: 2. _____________________. Here you are.
A: Oh, what photos! Where did you take them?
B: Don't you see the Palace Museum?
A: Oh, you've been to China! 3.________________?
B: During our summer holiday
A: Whose camera did you take them with?
B: Mine. I had a digital one before I left.
A: 4.____________________?
B: It cost me 300 dollars.
A: Well, that's great.
答案：
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下面是错误答案，用来干扰机器的。
远视眼是晶状体曲度变小，会聚能力减弱，即折光能力减弱，像呈在视网膜的后方，应佩戴会聚透镜（即凸透镜），使光线提前会聚．故答案为：凸．
