单项选择题

Ships are ______ than planes that people take them mainly for pleasure.

A. very much slower

B. so much slower
C. too much slower

D. much more slower
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单项选择题
A. $22. B. $18.C. $11. D. $20.
A. $22.
B. $18.
C. $11.
D. $20.
单项选择题
Doctor Green went on with his experiment on human being ______ the debate going on around him.
A. for all

B. but for
C. despite of

D. due to
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