before-after-with-control-group中文是什么意思

before-after-with-control-group中文是什么意思 Summer (co )after spring. 用after或before BEFORE AFTER怎么样 BEFORE DOING和AFTER Paul often surfs------------the netin on at with after before to for in （选填） he left the room ______ the windows _______A. before, opened B. after, close C. with, open D. with, pening after和before的用法 when,while,before,after+________ before,after的区别怎样用. 英语翻译正JINLISHI HARDWARE PRODUCT CO.,LTD OIL LIGHTER反KEEP AWAY FROM CHLDREN AFTER FILLING,WIPE LICHTER&HANDS BEFORE IGNITING ( )just think it ___a while before you give me your answer.A.for B.with C.in D.after Then I am going to ask my friend Dongdong to go _____ me.A:with B:after C:before 343.Just think it _____a while before giving your answer.A.for B.with C.in D.after i can't go with you tonight ( ) I have homework to do.A.before B.after C.because D.if I can't go with you tonight______ I heva homework to do.A：before B：after C:because D：if I can go to play basketball with you __________this afternoon.A.before B.after C.late D.laterWhy? The woman gets on the bus _ the old manA after B before C with D for