—Why are you so busy, Mike ? —I ______ a
问题:
—Why are you so busy, Mike ?
—I ______ a novel these days.
A.was writing
B.wrote
C.am writing
D.have written
—Why are you so busy, Mike ?
—I ______ a novel these days.
A.was writing
B.wrote
C.am writing
D.have written