问题描述：
his kind of machine____often _____cut things.Tom has lived in China for many years ,
his kind of machine____often _____cut things.
Tom has lived in China for many years ,so he___ using chopsticks.
用 used to /be used to 填空
his kind of machine____often _____cut things.
Tom has lived in China for many years ,so he___ using chopsticks.
用 used to /be used to 填空
问题解答：
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