i exercise with an empty stomach与i exercise on an empty stomach,with与on有什么区别

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• 英语 替换短语 谁来帮我一下1 It seem that never (loses interest in) playing game on his computer2 This exercise is most beneficial if practiced (for several times) a day on an empty stomach3 There are some children walking down the street,(holdingeach other's hand)4 Jessica (found) some old letter (by chance) when she was cleaning the room5 The TV show was so boring that I (fell asleep)in the middleof it6 A teacher should encourage students to ask question they mi
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