_____ once every two years, whether it is a car, a bus or a lorry, is the rule that all drivers must obey our country.A.Having been examined B.Examined C.ExamingD.Being examined选什么?为什么?

he goes to the library once every two weeks.句型转换he goes to the library _____ _____ _____. every和once 有什么区别啊?例如every two days 和once two days We have computer lessons ()A.once two weeks B.twice two weeks C.once every two weeksD.twice every weeks every other morning ,once rvery two mornings 的意思↑ 英语翻译两周一次这几种表达法,哪个正确呀?1,once every two weeks2,once per two weeks3,one time every two weeks4.one time per two week? Teeth need to be check once every two years.中的once是什么意思,起身作用?在线等 We can read books in the school reading room once every two weeks/(划线提问)划线部分为once every two weeks/ 一道英语语法选择题_____ once every two years,whether it is a car,a bus or a lorry,is the rule that all drivers must obey our country.A.Having been examined B.Examined C.ExamingD.Being examined _____ once every two years, whether it is a car, a bus or a lorry, is the rule that all drivers must obey our country.A.Having been examined B.Examined C.ExamingD.Being examined选什么?为什么? every two Simon plays football ______ a week.A.once B.two time C.every two days D.sometimes说明一下理由 once every 每年一次? their birthdays only come _____ four years是填each,every还是once Mike _____ (do) his homework every day and he ____ (watch) TV once a week. They meet once every Wednesday afternoon.改为同义句.要求改为：They ____ ____ _____ every Wednesday afternoon. She watches TV for two hours every day.同义句She watches _____ _____ _____TV every day. 1、Simon plays football everyday Monday and Thursday.so he play _____ a week.A.once B.twice C.every two days D.sometimes2、_____ of us are teachers.Several aren't.A.All B.Some C.Most D.None3、I usually go to work by bus,but ____ I walk there.A.som Mrs Green spends two hours on housework every day.(改为同义句)It ____ Mrs Green two hours _____ _____ housework every day.