I _____ reading a book., am, is, are, She _____ riding a bike., am, is, are, We _____ swimming, am, is, are, Jim _____ sitting., am, is, are, The boys_____ listening to the radio., am, is, are, The monkey _____ jumping., am, is, are

be doing

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I he she it + is am are
I he she it + is am are
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完成句子
He/She/It/We/They _____ doing
He/She/It/We/They _____ doing
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随堂测验
is, am , are
is, am , are
由
随堂测验
has have is am are
has have is am are
由
随堂测验
book1 unit2 - am/is/are (I, You, He, She)
book1 unit2 - am/is/are (I, You, He, She)
由
打地鼠
to be: is am are
to be: is am are
由
完成句子
Present Simple am / is / are (Missing Words)
Present Simple am / is / are (Missing Words)
由
完成句子
have has am is are can
have has am is are can
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