it was essential that the form __back before the deadline.A.must be B.be sent C.would be sent Dwas sent.答案是B请帮我分析下为什么其他几个不可以呢.

It was essential that we sing lease before the end of the month汉语怎么翻译? Tom did not take away the camera becaure it was just tha same camera( )he lost last week. 1.It was essential that the application forms ____________back before the deadline.A.must be sen1.It was essential that theapplication forms ____________back before the deadline.A.must besent B.would comeC.be sent D.were sent------------》我选择 It was essential that的用法,并请讲一下这类的其他的词及用法, essential essential essential essential essential essential there is considered ___ no risk.A.to have been,B,tha it is,C.to having been D.that it was It was believed tha t things would get worse, but ___ it is they are getting better.It was believed that things would get worse, but as it is they are getting better.请翻译成中文. it was essential that the application forms be send back before the deadline.麻烦我想问下 这地方 为什么不能用would be sent一定要用should It was essential that the application forms()back before the dealine A.be sent B.were sent这A与B语法上有什么不同了? To make what is said above__,English is essential.A.possible B.it possible C.was possibleD.possibility 请帮我翻译和详细解答好吗?非常感激! 1.It was essential that the application forms __________1.It was essential that theapplication forms ____________back before the deadline.A.must besent B.would comeC.be sent D.were sent选B,但为什么不选C?2.If you _____that night,you mighthave b 6._______ she first heard of the man referred to as a specialist.A.That was from Stephen C.It was from Stephen that B.It was Stephen whom D.It was Stephen that7.It was essential that the application forms ________ back before the deadline.A.must be s 英语翻译It was noticed early in the development of these methods that the in which a set of perturbations tends in the limit to one of the solutions of the original problem was not essential to the proof .