单项选择题

______, I didn’t know how to use the machine.

[A] At beginning
B. At first
C. At start
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What day is it tomorrow
A. Friday.
B. Monday.
C. Sunday.
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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