______ nearly all behavior is learned behavior is a basic assumption ______ has been put forward by the social scientists.
| A．What, that | B．That, what | C．What, what | D．That, that |
Under the circumstances I usually think of the great effo
rt and courage it _____ for the girl to come back and apologize.
| A．made | B．afforded | C．spared | D．took |
Obama, _____ president of the USA, won _____ Nobel Prize for Pease in 2009.
| A．\; a | B．a; the | C．\; the | D．the; a |
— Hi, Maria! I got the first place in the exam.
— ______! Everyone knows you cheated and you just copied Tony’s.
| A．Congratulations | B．Come on | C．Good luck | D．Cheer up |
The weather turned out to be fine yesterday. I_____ the trouble to carry my umbrella with me.
| A．should have taken | B．could have taken | C．needn't have taken | D．mustn't have taken |
I was about to leave the office ______ an unexpected visitor came.
A. whileB. asC whenD. before