题目内容
19．What's a reasonable tip to leave to the waitress？_________．I usually leave 20% of the dinner price．（ ）
| A． | Help yourself． | B． | It's up to you． | ||
| C． | That's the point． | D． | It's a deal． |
分析 ---给服务生多少小费是合理的？
---取决于你．我通常给的小费是晚餐价格的20%．
解答 答案B．
A项"自便，请自便，别客气"；C项"这正是问题的关键"；D项"一言为定，成交"；B项"取决于你"；根据答句中的"I usually leave 20% of the dinner price"可知，说话者表示自己通常给的小费是晚餐价格的20%，至于给多少算是合理的，这得因人而异，取决于各个人，故选B．
点评 本题考查情景交际．解答此类题目首先应该读懂句意，分析上下文语境和逻辑关系．其次对每个选项中的交际用语的适用情况要掌握，根据语境锁定正确答案．关键平时学习中要对交际用语多积累多总结反复记忆．
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