①December 21st of 2012 is a special day,______ people all over the world will remember forever.
A.it
B.one
C.this
D.that
为什么选B而不选D
②
—I didn’t go to Joan’s party last night because my car broke down.
—You could have borrowed mine.I ______ it.
A.hadn’t used
B.didn’t use
C.wasn’t using
D.am not using
为什么选C不选B