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

<上一题目录下一题>

热门试题

单项选择题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.