As you know, this is the day（ ）the quake happened thirty years ago.
A.正确答案Dthat
B.for which
C.where
D.when
As you know, this is the day（ ）the quake happened thirty years ago.
As you know, this is the day（ ）the quake happened thirty years ago.
A.正确答案Dthat
B.for which
C.where
D.when
