they are some difficult math problems.改为单数句 ____ ____ diffic
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they are some difficult math problems.改为单数句 ____ ____ difficult math problems.
There's a difficult math problem.
they are some difficult math problems.改为单数句 ____ ____ diffic
There are some diffcult physics problems 改为单数句
They are some aunts.翻译并改为单数句
They are some good dictionaries.改为单数句怎么改
They are some easy English question.改为单数句
They are some English books.改为单数句
They are waitresses.(改单数句) ____ is a waitresses.
they discussed about math problems just now.改为同义句
1.Those are apples.(改为单数句) That___ ____ ____.
They have some problems ____ for the party.
They are enjoying themselves.(改为同义句) They are_____ ____ ____
They are some frogs.变为单数句