Opportunity knocks but once 翻译

Opportunity seldom knocks twice. Opportunity knocks but once 翻译 an opportunity knocks only once. an opportunity knocks only once. Opportunity seldom knocks twice.怎么读 求翻译：Opportunity knocks but once．啥意思呢 谁帮我翻译一下…opportunity knocks but once. 求翻译啦 Opportunity knocks but once．啥意思呢 opportunity knocks once,and the neighbors the rest of the time.怎么翻译 Max is so funny that he often______my books and pens when he walks past my desk.A.knocks at B.B.knocks on C.knocks over D.knocks in opportunity He ____his homework when someone knocks at the door.A.does B.is doing please tell me if he knocks()the door.A.at B.in C.with D.by 英语翻译Opportunity seldom knocks twice.Time and tide wait for no man.A friend in need is a friend indeed.Table friends soon changes.Old friends and old wines are best. 英语翻译Wether one is able to utilize every opportunity well or not depends largely on the attitude he is to adopt towards difficulties or even failures.这句话怎么翻译?还有一句Opportunity knocks but 第一句的开头是Whether不是w While i was reading i heard someone____at the door of partiesA knocked B knocks C to knock D knock the parrot knocks()his beak()the cage door.A.with in B.by on C.with on D.by in knocks him down中文怎么说