it going?Great!A. What’sB. How’sC. Why isD. Where’s

问题补充：

--- it going?

--- Great!

A. What’s

B. How’s

C. Why is

D. Where’s

答案：

A. What’s

(答案→)B. How’s

C. Why is

D. Where’s

解析：How’s it going ？为固定搭配。