其他（共1小题）
I haven’t decided when we should start ．（同义句转换）
I haven’t decided_________________ start ．
Why did he go to bed so early ? I don’t know ．（合并句子）
I don’t know_______ he_______ to bed so early．
He put down the things before leaving ．（变为否定句）
He down the things before leaving。
He usually learns English by taking notes ．（对划线部分提问）
_______does he usually_______ English ?
The girls don't know what they can do next．（改为简单句）
The girls don't know what next．
There are three thousand students in the school．（改为同义句）
The of the students in the school three thousand．
My friend asked me，" When will you go to Hainan for your holiday？"（改为间接引语）
My friend asked me I go to Hainan for my holiday．
These flowers are very sweet．（改为感叹句）
flowers they are!
These apple trees were planted by the students in Class 1．（改为一般疑问句）
these apple trees by the students in Class 1？