题目内容：

其他（共1小题）

1.I haven’t decided when we should start ．（同义句转换）

I haven’t decided_________________ start ．

2.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．

3.He put down the things before leaving ．（变为否定句）

He                  down the things before leaving。

4.He usually learns English by taking notes ．（对划线部分提问）

_______does he usually_______ English ?