根据对话内容，从方框内选择合适的句子补全对话。（有两项多余）

A: You don't look very happy, Betty. What happened?

B: (1)_________

A: When did you buy it?

B: Just half a year ago.

A: It must be very cheap, right?

B: No. (2)_________

A: Why did you buy this one?

B: (3)_________ The words in the ad sounded good, so I decided to buy one.

A: (4)_________ Some are misleading. They just lead you to buy the products, but they don't tell you anything about the quality of them.

B: You are right. We can't believe them all the time. (5)_________

A: Sure. You should compare more products and choose the best one.

胫骨下端（）。

A.膨大形成内侧髁和外侧髁

B.内侧面有关节面

C.向内下突起为内踝

D.前面有胫骨粗隆

E.与足舟骨形成关节