单项选择题Sandre came across an important letter yesterday while cleaning the desk.
单项选择题Extremely refined behavior, however, cultivated as an art of gracious living, has been characteristic only of societies with wealth and leisure, which admitted women as the social equals of man.
单项选择题Japan made a proposal to Korea for increasing trade between two countries.
单项选择题If you have any complaint please see the manager.
单项选择题We should be cautious in crossing a crowded street.