单项选择题

What can be the best title of the passage

A．Computer Information Helps Firefighters.
B．New Computer System is Appreciated by Firefighters.
C．Popular Computer System in Kansas.
D．Firefighters Need Computer Help.

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单项选择题

Alice received an invitation from her boss, ______ came as a surprise.

A．it
B．that
C．which
D．he

单项选择题

Paul doesn't have to be made ______ . He always works hard.

A．learn
B．to learn
C．learned
D．learning