30．The farmers were more anxious for rain than the people in the city because they had more　 .

　 A．at length　 B．at last　 C．at stake　 D．at most

29．As is often pointed out, knowledge is a two-edged weapon which can be used　　　 for good or evil.

　 A．similarly　 B．widely　 C．equally　 D．properly

28．Heavy drinking used to be acceptable, but as drunken driving has caused so many tragedies public opinion is no longer　　　　 .

　 A．accurate　 B．tolerant　 C．appropriate　 D．reliable

27．Government should adopt laws that would ban advertising and other types of 　　of tobacco products.

　 A．delivery　 B．spread　 C．promotion　 D．discount

26．The managing director took the　　　 for the accident, although it was not really his fault.

　 A．guilt 　B．response　 C．blame　 D．accusation