单项选择题


A．efficiency
B．energy
C．time
D．money
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单项选择题
A．spreadB．passedC．printedD．completed
A．spread
B．passed
C．printed
D．completed
单项选择题
A．tries to coverB．manages to coverC．fails to coverD．succeeds in
A．tries to cover
B．manages to cover
C．fails to cover
D．succeeds in
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