单项选择题
The dolphin may be（）but it seems to want to communicate.
A.comb B.dumb C.numerous D.overcome
单项选择题 Football, basketball and baseball are the（）sports in the USA.
单项选择题 All career decisions require us to（）these two kinds of knowledge.
单项选择题 She was caught without a ticket and fined thirty dollars（）
