单项选择题

Neither Bill nor his parents ______ at home.

A．is
B．are
C．has
D．was
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单项选择题
The reason ______ I'm writing is to tell you about a party on Saturday.
A．because
B．why
C．for
D．as
单项选择题
A professional wine taster must rely on taste, sight, ______ the quality of a wine.
A．and to smell to determine
B．and smelling to determine
C．and determine to smell
D．and smell to determine
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