单项选择题

Mother was worried because little Alice was ill, especially ______ Father was awayin France.

A．as
B．that
C．during
D．if
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单项选择题
There is no doubt that he is a good professor ______ he is doing fine.
A．but
B．because
C．so
D．yet
单项选择题
We were told that we should follow the main road ______ we reached the central railway station.
A．whenever
B．until
C．while
D．wherever
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