sing in is required是什么意思

sing in is required是什么意思 she ( ) often ( )【hear】to sing in her room答案是she is often heard to sing in her room.为什么?. sing is not a very in thing 英语翻译in the rugulations that you should not tell other paople the password of your mail accountA.what is required B.what a requires C.it is required D.It requires是在 in the regulations 的前面 Millie si often heard sing in the next room改错Millie is often heard sing in the next roomis打错了，是这样 He is often heard -----in the next room.A sing B to sing C singing Dsang可我觉得是B啊! The girl is often heard ____ (to sing / singing )happily in her room.以及原因我认为是to sing 因为有often这类的 该怎么填 lvalue required in fuction this field is required? Password is required是什么意思? title is required是什么意思 battery is required是什么意思 in lieu of 在这句话里是?This document is not issued in lieu of any locally required business license ,permit and registration. Mary ___ some songs in her room in the morning.A.heard sing B.heard to sing C.was heard sing D.is heard to sing为什么? 11Tom is the only one of the boys___best in hisschoolAwho sing Bwho sings Cthat sing Dwhose sing 11Tom is the only one of the boys___best in hisschoolA who sing Bwho sings Cthat sing Dwhose sing if participation in community service is required of everyone,tolerance,equality,andIf participation in community service is required of everyone,tolerance,equality,and cohesiveness will increase in society.. Listen!A girl____in the classroomA.sing B.singing C.in singing D.is sing