______ she couldn't understand was _____ fewer and fewer students showed interest in her lesson.
A. What; why
B. That; what
C. What; because
D. Why; that
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Little Tommy was reluctant to tell the schoolmaster______ he had done the day before.
A. that
B. how
C. where
D. what
_______ you don’t like him is none of my business.
A. That
B. Who
C. Why
D. Whether
What the doctors really doubt is ________ his mother will recover from the serious disease soon.
A. when
B. how
C. whether
D. why
These flowers are so special I would do _______ I can to save them.
A. that
B. Whatever
C. which
D. whichever