根据括号内的要求进行句型转换。

1．I don't know where I should go．（变为简单句）

I don't know where ________________．

2．You could write him a letter．（变为一般疑问句）

________ I ________ him  a letter?

3．He was playing computer games when I came in．（对划线部分提问）

________ he ________ when you came in?

4．“Where do you live，Tom?” Mr. Green asked．

Mr. Green asked ________ where ________ lived．

5．I think she can speak Chinese and Japanese．（改为否定句）

I think she can speak Chinese ________ Japanese．