【单选题】_______by the rising price of gas, many car owners use their cars less frequently. [ ]
【单选题】Which group does NOT use posters frequently?
【单选题】The highest rate of skin cancers is found in teenagers who use sun lamps frequently.
【单选题】All of us thought _________ no use talking about some unpractical matters frequently.
【简答题】A.Consult with her frequently. B.Use the computer regularly. C.Occupy the computer early. D.Wait for one's turn patiently.