根据所给的汉语提示，转换下列句型。

1.  Japanese is less important than English.(改为同义句)

    Japanese is not ______ important ______ English.

2.  Both Li Lei and Xiao Lin are in Grade 9.

    Not only Li Lei ______ Xiao Lin   ______in Grade 9. (改为同义句)

3.  A man sleeps 8 hours per day.(对画线部分提问)

    How ______does a man ______ per day?

4.  He used to behave badly in class, ______.(改为反意疑问句)

5.  Why don't you do that again?(改为同义句)

     Why ______ ______ that again?

婴幼儿的体温调节中枢发育不完善，对冷热温度的刺激反应较为迟钝。（）