单项选择题

Was it because he was ill ______ he asked for leave

A．and
B．that
C．that's
D．so
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单项选择题
______ that this region was so rich in natural resources.
A．Little he knew
B．Little did he know
C．Little he did know
D．Little he had known
单项选择题
Heat does not travel by convection in solid, because the solid does not move,______
A．so does a liquid
B．so a liquid does
C．as does a liquid
D．so is a liquid
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