单项选择题

It makes no difference to me _______ Mr. Smith will come or not.

A．when
B．how
C．that
D．whether
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单项选择题
It was in China _______ the agreement was signed.
A．that
B．which
C．where
D．what
单项选择题
When the old lady is alone in the house, her dog makes her feel _______ and relaxed.
A．healthy
B．lonely
C．safe
D．angry
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