请求解释一个用词You should be called upon at any time because accidents invariably happen when they are lease expected.上面的UPON在这里起意思?有什么作用?去掉的话可以吗?

请求解释一个用词You should be called upon at any time because accidents invariably happen when they are lease expected.上面的UPON在这里起意思?有什么作用?去掉的话可以吗? 请求解释 一手遮天用词解释 解释一个英语单选题——You didn'tinvite Mary to the hall?——_________her,too?A Must I invite B Should I have invited C Must I have invitedD Should I invite 你可以向你的朋友请求帮助 You should ____your friends_____ _______- 请求翻译Something likes water ,you should be look as wind . 第二题,请求解释 请求仔细解释 请求仔细解释 ___ I have a word with you?It won't take long.A.Can B.Shall C.Must D.Should 为何不选B?shall不是也可表请求许可么? hatch用词源怎么解释 in no condition( )you are a Chinese.&rdquo dad told me befe i went abroad .A.you should fget B.fget you C.shouldn&rsquot you fget D.should you fget .这句要怎么解释 .为什么不选C if you -----see mr.wilson,give him my regards.a would b shall c should d will为什么选c,should在此如何解释 英语题,要有解释. ---you should exercise exercise every day to stay ().A.unhealthy B.healthy C.health Not only ______do this work,but（ also）_____finish it on timeA.you should ,you should B.should you,should you C.should you ,you should D.you should ,should you Why now,I will still think you think shed tears 请求解释下. I think the best thing in life __(be) freedom ,do you think so?用词的适当形式填空并加解释.新目标七年级下册英语配套练习册UNIT 8 B You should work hard and b---- ourselves.