单项选择题

______ you return those books to the library immediately, you will have to pay a fine.

A．Until
B．If
C．Unless
D．Provided
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单项选择题
—Does Alan like hamburgers—Yes. So much ______ that he eats them almost every day.
A．for
B．as
C．to
D．so
单项选择题
______ classic music, which follows formal European tradition, jazz is a spontaneous and free form.
A．In contrast to
B．In connection with
C．In comparison with
D．In regard to
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