单项选择题

They lost their way in the forest, and ______ made matters worse was the night began to fall.

A．that
B．what
C．it
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单项选择题
I want to have some ______, please.
A．potatos
B．tomato
C．oranges
单项选择题
The bag ______ books ______ mine.
A．full of; are
B．full of; is
C．full in; are
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