11．
After a study showed that one in every ten meals in the country may be cooked with dirty oil，the State Fool and Drug Administrations（SFDA）on Thursday issues an emergency notice（发布紧急通知）to restaurant nationwide，warning them against recycling oil．
The swill-oil is cooking oil refined from kitchen waste that has been recycled．Although it looks clean and clear，it's actually so dangerous to people's health that it may cause cancer．
According to a reporter，the swill-oil business is extremely profitable．Recycling one ton of kitchen waste will produce130kg of swill oil．With its price being half that of normal cooking oil，a profit（利润）of 1.5to 2billion yuan is produced in the whole swill-oil business in the country every year．The profit is almost 200%，so it's easy to understand why the business is so hot．s
He Dongping，a professor from Wuhan Polytechnic University（WHPU）said："To stop the use of dirty oil should start at its source，kitchen waste．And the first step is to find a good way of collecting kitchen waste．""However，it might take about 10years before China could solve the problem completely．"he added．
66．According to the study，Cof us may have eaten the food cooked by dirty oil．
A．few B．nobody C．many
67．It'sCto tell the difference between swill-oil and normal cooking oil just by looking．．
A．fast B．easy C．hard
68．The underlined sentence"The swill-oil business is extremely profitable"means that the swill-oil business is really aA．
A．big money-maker B．common situation C．terrible thing
69．We can infer（推断）from this passage thatB．
A．the biggest problem is that restaurants produces too much kitchen waste
B．the way of dealing with kitchen waste isn't good enough now
C．we can stop the use of swill-oil in a short time if we take it serious
70．The main topic of this passage is aboutB．
A．restaurant service B．food safety C．eating habits．
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