11.It's the fact ____ he dosen't know his own birthday ____ surprises us all.(C)
A.which ; which
B.which ; that
C.that ; that
D.that ; which
12.---Where did you put the car keys?
---Oh ,I ____ I put them on the chair because the phone rang as I ____ in．(D)
A.remembered ; come
B.remembered ; was coming
C.remember ; come
D.remember ; was coming