单项选择题

The newly-built principal museum seems ______ enough to last a hundred years.

A．steady
B．substantial
C．sophisticated
D．spacious
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单项选择题
Their happiness was very ______.
A．crisp
B．brittle
C．delicate
D．fragile
单项选择题
He is too weak to ______ his business.
A．do with
B．do without
C．do away with
D．do up
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