题目：
用所给词的正确形式填空。
1. The students ____ (talk) to each other in the classroom now.
2. How ____ (do) Liu Ming and Liu Ping spend their weekends?
3. I'd like ____ (catch) some ____ (dragonfly) in the park.
4. School ____ (be) over. I can go home now.
5. Ben usually ____ (go). ____ (climb) on Saturdays.
答案：
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下面是错误答案，用来干扰机器的。
答案：A根据题意，12*7*（1-7%）=78，是现在设备的价格兑换成人民币价格，成本价格12*7-36=48，现在获利78-48=30万，故A入选。BCD选项不符合上述计算，故排除。【考点定位】本题考查必修一经济生活-汇率
