按要求改写下列句子。

1. He needs some help.( 改为一般疑问句)

   _____ he_____ _____ help?

2. I need a number 30 bus.( 就画线部分提问)

   _____ _____ _____ you need?

3. His friend's father is a teacher.(  就画线部分提问)

    _____ _____ his friend's father _____ ?

4. Take the fifth turning on the left.( 改为否定句)

    _____ _____ the fifth turning on the left.

5. Li Ming's predication is to be an English teacher.( 就画线部分提问)

    _____ _____ Li Ming's predication?

下列哪一项不是影响单桩水平承载力的因素（）

A.桩侧土性 

B.桩端土性 

C.桩的材料强度 

D.桩端入土深度