单选题The ______ of heavy equipment should be left to professionals because of the safety regulations.AoperateBoperationCoperatedDoperator
单选题
The ______ of heavy equipment should be left to professionals because of the safety regulations.
A
operate
B
operation
C
operated
D
operator
参考解析
解析：
句意：按照安全规则，重机械应由专业人员操作。空格前定冠词the，后有介词of，应填入名词，且此处意为“重机械的操作”，应选择operation。
句意：按照安全规则，重机械应由专业人员操作。空格前定冠词the，后有介词of，应填入名词，且此处意为“重机械的操作”，应选择operation。
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