Repairs must be done to this road.这句话怎么解释?1

Repairs must be done to this road.这句话怎么解释?1 must be must have done 区别 must have been done/must be done求解两者异同 must be done和 must have done区别 i can't go to the film with you because this work ()at once.为什么填must be done,不是有主语i的吗?how long will it take you ()the repairs?（complete）这句话什么意思？ 合并句子all can be done.all must be done RRT:V MUST BE DONE FIRST Justice must not only be done,but must be seen to be done must have done和must be的区别?权威 something must to be done和something must be done区别 All that must be done----(do)难道填All that must be done done(do)吗？汗 用what或者who合并句子all can be done.all must be done All can be done. All must be done.合并为一个句子怎么写? 为什么? Everything___ should be ____ be done right now.正确答案为什么是A呢?A.that,done must B.that,must done C.which,done should D.that,should Something must be done to stop wild animals ------(kill) 用Something must be done to句型造十个句子 there must something can be done有几种理解意思? something must be done something must be done to ＿＿＿＿（stop) this kind of thing _______(happen)