【单选题】People complain that (the cost) of (setting up) a company (are) so great that only the rich can afford (to run) a company in the country.
A．the cost
B．setting up
C．are
D．to run
网考网参考答案：C
网考网解析：
应改为is。因为本句的主语是the cost，是不可数名词。
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