单项选择题

What does the passage mainly discuss

A．The increase of private mail service.
B．A comparison of urban and rural postal services.
C．The development of government postal system.
D．The history of postage stamps.

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单项选择题

A student may pay the least tuition if he studies________.

A．at a community college within his own state
B．at a public university
C．within his own state
D．at a four-year college

单项选择题

________danger, he took a knife along with him.

A．Expecting
B．Hoping for
C．Anticipating
D．Looking forward to