His mother made a big cake for his birthday．（改为被动语态）
A big cake by his mother for his birthday．
The scientists released the picture of a black hole to the world on April 10．（改为被动语态）
The picture of a black hole to the world by the scientists on April 10．
Lucy borrowed the book 5 days ago．（改为同义句）
Lucy the book for 5 days．
The shirts are made of silk．（改为否定句）
The shirts made of silk．
The girl in red is my friend．（对划线部分提问）
is your friend？
China's Chang'e 4 landed successfully on the far side of the moon on January 3，2019．（对画线部分提问）
did China's Change﹣4 successfully on January 3Id，2019？
"Are you OK？"my mother asked me．（改为间接引语）
My mother asked me I OK．
It seems that she is a friendly teacher． （改为同义句）
She seems a friendly teacher．
He goes fishing ____in the summer．（对划线部分提问）
Does he go fishing？
I did some washing this morning． （改为一般疑问句）
you any washing this morning？
I find it difficult to learn physics．（变成复合句）
I find to learn physics．
The Blacks got married thirty years ago. （改为同义句）
The Blacks have for thirty years.
China has been able to make big planes like C919 with scientists great efforts．（变为一般疑问句）
China able to make big planes like C919 with scientists' great efforts？
We often swim in the river．（用now 改成现在进行时态）
We in the river now．
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