题目内容
When you have food outside and sit on the ground and eat sandwiches，that is a __________.
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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 __________.
If you are not satisfied with the service, you could make a __________ to the manager.
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