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句型转换：按要求改写句子，每空一词。
Those are apples．(改为单数形式)
________ ________ ________ apple．
There are some cute penguins．(改为单数形式)
A．There is some cute penguins．
B．There is a cute penguin．
C．There is a cute penguins．
These are my aunts．(改为单数形式)
______ ______ my ______．
句型转换
They are some young women．(改为单数形式)
________ ________ a young ________．
These aren’t his brothers．(改为单数形式)
______ ______ his ______.