单项选择题

The oil must be used up, ______ the light went out.

A．since
B．as
C．because
D．for
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单项选择题
The new teacher was very nervous ______ she was well prepared.
A．despite
B．unless
C．even
D．even though
单项选择题
The new manager had many difficulties to overcome but he took them all in his ______.
A．step
B．position
C．stride
D．duty
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