32.I'm sorry to say__________of your answers is correct.
A. either
B. some
C. each
D. neither
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33.I had to tell the truth, __________?
A. haven't I
B. wouldn't I
C. didn't I
D. shouldn't I
34.__________is still unknown.
A. How he could break into the bank
B. How he was able to break into the bank
C. How he dare to break into the bank
D. How dared he break into the bank
35.The boy found a place in the old building__________he used as his first laboratory.
A. which
B. where
C. in which
D. the same
36.Make a mark__________you have an question.
A. what
B. that
C. where
D. why
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