问题描述:
试添加一个字母,把下列单词变成新单词
is+_____=______
and+_____=______
how+_____=______
as+_____=______
air+_____=______
is+_____=______
and+_____=______
how+_____=______
as+_____=______
air+_____=______
问题解答:
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