The questions put forward at the meeting are of vital importance.本句中中为什么不用essential?

.You should put forward(提出)the questions at the meeting.改为被动语态 The questions put forward at the meeting are of vital importance.本句中中为什么不用essential? If you know the answers to these questions please put up your r＿hands. The boy ( )his hand to ask questions.A raisedB put C rose The students,( ) at the way the questions were put,didn't know the answers to them.B surprised CThe students,( ) at the way the questions were put,didn't know the answers to them.B surprisedC their being surprised When you put up your hands in class,the teacher knows you want to say something or ask questions. The students can answer questions.They have to put up hands.(用 before 改成简单句） The students can answer questions. They have to put up hands.（用before改写成简单句） put to在这里的意思上下文如下:The authorities demand answers to questions that one would hesitate to put to one's intimate friends. Answer the Questions是什么意思 Answer the questions是什么意思? popping the questions The students,at the way the questions were put,didn't know the answer__B___to them.为什么选B?A.surprising B.surprised C.being surprised D.have surprised The students,______ at the way the questions were put,did not know the answers to them.选项:a、surprisedb、their being surprisedc、they being surprisedd、them surprised Before the end of his lecture,the professor may also _____ time for the students to ask him questions.a.lay asideB.brush asideC.set asideD.put aside answer the questions about the The students,______ at the way the questions were put,did not know the answers to them.1：The students,______ at the way the questions were put,did not know the answers to them.a、surprisedb、their being surprisedc、they being surprisedd、them s when you come out fo the station