Before we install a new heating system we should be sure we cannot make ______use of the one we already have.

admin2011-06-01 29

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。

转载请注明原文地址:https://kaotiyun.com/show/Hzad777K

托业阅读

相关试题推荐

随机试题

最新回复(0)