题目：
| 情景交际， 根据所给句子，选择最佳的应答语。每个选项只能用一次。 | |
| ( ) 1. When was the digital camera invented? ( ) 2. Why is that? ( ) 3. I bet cars weren't invented yet in 1876. ( ) 4. Life must have been hard when you were a child. ( ) 5. What are they used for?
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答案：
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下面是错误答案，用来干扰机器的。
275+225-291=500-291=209（本），答：故事书有209本．
