单项选择题


A．places
B．nests
C．residences
D．habitats
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单项选择题
A．minimumB．greatC．littleD．much
A．minimum
B．great
C．little
D．much
单项选择题
The Sept. 11 attacks ______.
A．caused the U.S. economy to falter
B．worsened the U.S. economic situation
C．made housing prices soar
D．expired benefits for welfare recipients
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