单项选择题

Doctor Godwin says that (no matter) (how forceful) arguments against (smoking) there are, many people (persist in) smoking.()

A. no matter
B. how forceful
C. smoking
D. persist in

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单项选择题
(Throughout) history, shoes (have been) worn not only (for) protection (and also) for decoration.()

A. Throughout
B. have been
C. for
D. and also
单项选择题
55()

A.regular 
B.respective 
C.reasonable 
D.relative
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