单项选择题

A．The use of oversized freight containers.
B．Safety problems with railroad tracks.
C．The growth of the automotive industry.
D．The high cost of meeting environmental regulations.
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单项选择题
A．They took objective tests. B．They specialized in one subject. C．They spoke instead of writing. D．They were timed by electric clocks.
A．They took objective tests.
B．They specialized in one subject.
C．They spoke instead of writing.
D．They were timed by electric clocks.
单项选择题
A．To explain a new requirement for graduation. B．To interest students in a community service project. C．To discuss the problems of elementary school students. D．To recruit elementary school teachers for a special program.
A．To explain a new requirement for graduation.
B．To interest students in a community service project.
C．To discuss the problems of elementary school students.
D．To recruit elementary school teachers for a special program.
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