___the safety of the gas,the government has checked the city's gas supply system.A.to ensureB.ensuringC.Having ensuredD.To have ensured.为什么不选D

the safety of是什么意思 一道英语选择题___the safety of the mountain A.turn about一道英语选择题___the safety of the mountainA.turn about. B.care aboutC.care for. D.turn to ___the safety of the gas,the government has checked the city's gas supply system.A.to ensureB.ensuringC.Having ensuredD.To have ensured选哪个? ___the safety of the gas,the government has checked the city's gas supply system.A.to ensureB.ensuringC.Having ensuredD.To have ensured.为什么不选D a except for b in spite of c apart from d instand of 选什么 为什么 考什么 怎么区分___the layers ,volunteers from the libyan red cross society also joined the efforts in helping the chinese go home safety there comes the issue of personal safety the sense of safety leaves me behind 根据中文翻译句子(中国政府非常关注食物安全)The Chinese government ____ ___ ___ ___the food safety 根据中文翻译句子(中国政府非常关注食物安全)The Chinese government ____ ____ ___ ___the food safety The Feelings of safety是什么意思翻译成中文 英语作文 the safety of our dorm in my eyes The bird is ___the top of the tree. MARGIN OF SAFETY怎么样 翻译Make the limits of the safety area the limits of the hangar. Please look ___the map of china on the wall. The death of wolves is the safety of the sheep这句话什么意思? The patient has been _____ of the safety of the operation 求助小作文：The Safety of FoodThe Safety of Food1)In recent years,there are many problems about the safety of food……2)The cause of this phenomenon is……3)The possible solution is……