单项选择题

Water is ______ hydrogen and oxygen．

A．made up
B．made up of
C．made by
D．making by
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单项选择题
Nelson said he had arrived on The ______ night.
A．previous
B．before
C．former
D．foregoing
单项选择题
Tom，with a dog，______standing at the gate．
A．Was
B．were
C．are
D．have been
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