单项选择题

A．elementary
B．crucial
C．rudimentary
D．fundamental
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单项选择题
A．made up ofB．consisted ofC．constituted ofD．made from
A．made up of
B．consisted of
C．constituted of
D．made from
单项选择题
A．in a wordB．in the meantimeC．in other wordsD．in that case
A．in a word
B．in the meantime
C．in other words
D．in that case
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