单项选择题

A．because
B．because of
C．for
D．in that
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单项选择题
A．wereB．areC．usedD．had been
A．were
B．are
C．used
D．had been
单项选择题
Who volunteered to clean up the oil
A．Businessmen, storekeepers, students and others.
B．Storekeepers, reporters, businessmen, and others.
C．Farmers, scientists, teachers and others.
D．Scientists, technicians, businessmen and others.
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