题目内容
At a __________ dinner, you must not wear casual clothes like flip flops and jeans.
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When you have food outside and sit on the ground and eat sandwiches，that is a __________.
The meat we get from pigs is called __________.
Some restaurants only accept __________ so make sure that you have enough with you.
If you are satisfied with the service, you can give the waiter a __________.
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