单项选择题A．A more economical diesel fuel.B．Characteristics of a new type of fuel.C．Where a new energy source is located.D．How to develop alternative energy sources.

单项选择题A．Go to an art exhibition.B．Dine out with an old friend.C．Attend the opening night of a play.D．See his paintings on display.

单项选择题A．The women didn’’t pay their rent on time.B．She can’’t find anyone to repair the dishwasher.C．She had to buy a new dishwasher.D．Paula had some repairs done without her permission.

单项选择题The minimum amount of fish for a healthy diet is two portions a week including canned and smoked fish.

单项选择题A．The foggy weather has affected Mary’’s mood.B．They are puzzled about Mary’’s low spirits.C．Mary is dissatisfied with her promotion.D．Mary cares too much about her looks.