根据所给提示填空，每空填一词。

题型：单词拼写题类：常考题难易度：普通

仁爱科普版九年级上Unit 4 Amazing Science Topic 1 When was it invented?同步练习

根据所给提示填空，每空填一词。

（1）、They could fly over high mountains with the help of (热气球) at that time.

（2）、Do you know the meaning of the symbols on the (键盘)?

（3）、They are playing games with toy (枪).

举一反三

She may{#blank#}1{#/blank#} {#blank#}2{#/blank#}a cut like that．

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