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Before we install a new heating system we should be sure we cannot make ______use of the one we already have.
Before we install a new heating system we should be sure we cannot make ______use of the one we already have.
admin
2011-06-01
42
问题
Before we install a new heating system we should be sure we cannot make ______use of the one we already have.
选项
A、efficiently
B、efficiency
C、efficient
D、more efficiently
答案
C
解析
这句话的意思是说,在安装新的供暖装置之前,我们应该确保对现有设备不能再加以有效使用。空格处缺少形容词做use的定语,故选(C)。(A)efficiently副词,有效地;(B)efficiency名词,效率。
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