问题描述：
You can take a plane at an_____.You have to take
You can take a plane at an_____.
You have to take your_____when you go abroad.
You must buy a_____before you get on a train.
You use a______to brush your teeth.
You can take a plane at an_____.
You have to take your_____when you go abroad.
You must buy a_____before you get on a train.
You use a______to brush your teeth.
问题解答：
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