it must be oral English machin .中must be如何理解及使用?为什么要有be,可以把be去掉吗?

it must be oral English machin .中must be如何理解及使用?为什么要有be,可以把be去掉吗? the professor from beijing unirersity says that oral english is important for people tocommunicate with foreigners ,but it --------be regular exercise.must can will may 用所给词的正确形式填空:oh,it must (be)an oral English Machine.这是七年级下期七单元检测的题 It Must Be?歌词 it must be It Must Be Love 歌词 It must be some catch. It must be him 歌词 it must be _____(interest) it must be rainy( )( )(随后) it must be imagination 歌词 It must be very happy. It must be something like it. 英语翻译it might be fun 和it must be oral ORAL there must be something wrong to it It must be there,---?反意疑问句