单项选择题

What will continue to be ______ it is today--next in importance to oxygen

A．how
B．which
C．what
D．as
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单项选择题
By the year 2010, scientists probably ______ an effective treatment for cancer.
A．will have discovered
B．are discovering
C．will be discovering
D．have discovered
单项选择题
Andrew, my mother's elder brother, will not be at the family party, ______ to the family's disappointment.
A．more
B．much
C．too much
D．much more
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