Qusetions---now and ---by the teacher.
A are being raised ,will have to be answered
B are raised,will have to answer
C have raised,will be answered
D have been raising,have been answering
（答案是A，我觉得如果是A的话，那么这句句子是什么意思呢？能否翻译一下，并且我觉得这种进行时在这里用好象不是很妥当啊，什么会是问题正被提出，就被老师回答了呢？）
2Probably,the aggreement ---tomorrow.
A will be reached B is going to reach
C is to be reached at D is arriving
(答案是A，我想问的是如果C改成is to be reached,能否算对呢？will do,is going to do,is to do之间有什么区别呢？

1.A完全正确.问题正在被提出,用进行时态.中文:现在(学生)正提出问题,而且老师将会回答.
2.C选项的at去掉,也是对的.三个用法基本可以通用.will强调意愿;be going to 表示某人打算去做某事;be to do 也表示计划做某事,但主语往往是something,所以常常是to be done.