Are they birds?改单数句
they are my friends改单数句
they are good friends 改单数句
they are offices.怎样改单数句
They are orange schoolbag改为单数句,怎么改啊!
They are some good dictionaries.改为单数句怎么改
They are my old friends.(改单数句)______________________________
They are waitresses.(改单数句) ____ is a waitresses.
你好、Are they student 改为单数句怎么改?
把they are boxes.改为单数句怎么改
they are some apples 改单数:---------- ------------- ----------
These are eggs.They are small and white.改单数句
What are they?They are buses改位单数形式