His mother made a big cake for his birthday．（改为被动语态）
A big cake by his mother for his birthday．
I borrowed an English book from my classmate．（改为同义句）
My classmate an English book me．
Lucy borrowed the book 5 days ago．（改为同义句）
Lucy the book for 5 days．
They were at home last night．（改为一般疑问句）
at home last night？
The girl in red is my friend．（对划线部分提问）
is your friend？
I did my homework yesterday．My mother came back．（合并为一个句子）
I my homework when my mother came back．
"Are you OK？"my mother asked me．（改为间接引语）
My mother asked me I OK．
In her spare time，Teacher Wang loves reading as well as writing．（改为同义句）
In her spare time，Teacher Wang loves reading writing．
He goes fishing ____in the summer．（对划线部分提问）
Does he go fishing？
I find it difficult to learn physics．（变成复合句）
I find to learn physics．
Now，more and more foreigners speak Chinese well．（变为被动语态）
Now，Chinese by more and more foreigners well．
It took him one and a half hours to finish the task．（变成同义句）
He one and a half hours the task．
China has a population of 1.37billion．（对划线部分提问）
the population of China？
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