________ she couldn't understand was ___
问题:
________ she couldn't understand was ________ fewer and fewer students showed interest in her lessons.
A.What ; why
B.That ; what
C.What ; because
D.Why; that
________ she couldn't understand was ________ fewer and fewer students showed interest in her lessons.
A.What ; why
B.That ; what
C.What ; because
D.Why; that