Who's standing under the tree?- -------怎么回答?

问题描述:

Who's standing under the tree?- -------怎么回答?
A.Tom is
B.Tom does
C.Tom are
D.Tom do

个人认为选A
原题中问的是who is.谓语是is而不是stand的ing形式,因此答案应该与问题保持一致.