根据情景选择合适的句子。1. 你到水果店里去买水果，想知道有没有香蕉，可以问：

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A. How much are they?
B. Do you have any bananas?2. 想知道梨卖多少钱，可以说：

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A. Two yuan.
B. How much are the pears?3. 觉得西瓜的价钱有点贵，可以说：

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A. That's expensive.
B. I'll take two, please.4. 想知道这些铅笔是在廉价出售的吗，可以问：

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A. How much is this?
B. Are the pencils on sale?1. B 2. B 3. A 4. B