强调句的问题

问题描述:

强调句的问题
Was it under the tree__D___ you were talking to a friend?
-- Sure.But when I got back there,the bike was gone.
A.that B.where C.which
D.while

A.that
It is.that .是强调句.你和你的朋友谈话的那个地方是不是在树下?
是,但当我回到那时,自行车已经不见了.