Don’t worry. Your mother is coming to help you.she doesn’t come and I am here alon

问题补充：

--- Don’t worry. Your mother is coming to help you.

--- she doesn’t come and I am here alone?

A. What about

B. What if

C. Why not

D. How about

答案：

A. What about

(答案→)B. What if

C. Why not

D. How about

解析：What about……怎么样；What if假使……将会怎么样；Why not为什么不……；How about你认为……怎么样。句意：不要担心。你的母亲就要来帮助你了。——假如她不来，我独自在这儿会怎么样？将会语境可知选B。