单项选择题

______ he began to realize how far he had been lagged behind.

A. Having entered the new school it was found that
B. After entering the new school
C. When he had been entering the new school
D. Upon entering into the new school

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单项选择题

According to the U.S. Federal Reserve, the output of automobiles might fall by ______ in November.

A．1.4%
B．3%
C．4%
D．1%

单项选择题

According to the speaker, what is one advantage of the maglev

A．It is more comfortable than a conventional train.
B．It doesn’t require much track maintenance.
C．It doesn’t remain in any station very long.
D．It carries more passengers than a conventional train.