___ nearly all behavior is learned behavior is a basic assumption of social scientists.
| A．/ | B．That | C．It is acceptable | D．When |
Security devices at airports are ______ to spot weapons that could be used by terrorists.
| A．pretended | B．intended | C．demanded | D．declined |
You ______ pay too much attention to your reading skills, as they are so important.
| A．shouldn’t | B．mustn’t | C．can’t | D．needn’t |
Sara, my colleague, has been ______ the run all week preparing for her son’s wedding.
| A．in | B．to | C．on | D．at |
American films always have ______ edge on foreign films at ______ Oscars, regardless of how popular a foreign film might be.
| A．an; the | B．the; the | C．an; / | D．the; / |
— It is so crowded and the pollution is so serious here!
— You see, ______. I’m going to quit my job and move to the country.
| A．I’ve had enough | B．I like it here |
| C．That will be OK | D．It’s not so bad |