According to a UN report, some 844 animals and plants ______ in the last 500 years.
| A．disappeared | B．were disappeared |
| C．have disappeared | D．had been disappeared |
．On Sunday he denied all knowledge of it, but on the __________ day he’d admitted to me that he knew all about it.
| A．previous | B．former | C．original | D．primitive |
Mary has just got an invitation to the party. She is now in a __________ as to whether to go there in her old dress or to stay at home.
| A．bargain | B．preference | C．commitment | D．dilemma |
Both sides are determined to get what they want, and there seems to be no possibility of __________.
| A．discount | B．motivation | C．compromise | D．harmony |
．Ms Li’s business _________ very quickly. She opened her first store two years ago; now she has fifty stores all over the country.
| A．transformed | B．ranged | C．responded | D．expanded |
．The middle-aged man said he would accept the job, so we have asked him to __________ his acceptance in writing.
| A．confirm | B．convey | C．convince | D．consider |