A．won t have beenB．needn t have beenC．mustn t have been……

单项选择题The newly developing science of artificial intelligence aims at programming the computer to think, reason and react ______ people do.

单项选择题I was impressed ______ the efficiency of the work done in the company.

单项选择题In the U.S. 88 percent of smokers had started before they were 18, despite the fact that it is ______ to sell cigarettes to anyone under that age.

单项选择题We have arranged to go to the cinema on Friday, but we can be ______ and go another day.

单项选择题I took the medicine, but it didn t have any ______ on me.

单项选择题Such ______ the case, there were no grounds to justify your complaints.

单项选择题My father seemed to be in no ______ to look at my school report.

单项选择题John was very upset because he was ______ by the traffic police with breaking the traffic regulations.

单项选择题Positions as teaching assistants ______ good writing and speaking skills.

单项选择题Mrs. Johnson ______ about it before me.