Future will be a marvelous world of artificial ______----- robots might have their emotions and we human beings might have robots as friends．
| A．preference | B．intelligence | C．exhibition | D．communication |
________ is generally agreed that a person with good qualifications and experience should be given a better job.
| A．It |
| B．As |
| C．Which |
| D．What |
It has been proved again and again ________frequent advertising increases product sales.
| A．that |
| B．whether |
| C．because |
| D．when |
—I don’t know about you,but I’m sick and tired of this weather.
—.I can’t stand all this rain.
| A．I don’t care | B．It’s hard to say |
| C．So am I | D．I hope so |
Walmart, which is one of the largest American supermarket chains, some of its stores open 24 hours on Mondays through Saturdays.
| A．keeps | B．keep | C．have kept | D．had kept |
Had they known what was coming next, they second thoughts.
| A．may have | B．could have |
| C．must have had | D．might have had |