用be(is,am,are)的适当的形式填空.1.This( )my mother.2.These( )our book
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用be动词的适当形式填空(am,is,are)Look!Some students_____________singin
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用动词的适当形式填空. 1. My mother _____ ( clean) our house yesterday
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These are my (parent)(选择适当的形式填空)
用适当的形式填空.1.Who( )(he)these girls?2.Those( ) (be)my rulers.3.
这几道英语怎么做用括号内词的适当形式填空1.This is _(I)book.2.This book is _ (I)3