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  • What are these?They have 3 eyes,red,yellow and green.Oh,they aretraffic light.But why do they have 3 colours?Because the

    What are these?They have 3 eyes,red,yellow and green.Oh,they aretraffic light.But why do they have 3 colours?Because there ary_______ ________.
    這是完整的題目,不知道橫線上填什么啊,
    英語人氣:693 ℃時間:2020-04-18 09:09:40
    優(yōu)質(zhì)解答
    What are these?They have 3 eyes,red,yellow and green.Oh,they aretraffic light.
    But why do they have 3 colours?Because there are _three______ __signals______.
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