我们常说 I am interested in doing sth，请问这里的 am 一定要加吗？可以说I interest in doing sth.吗？interested是动词还是形容词？类似的，如 be worried about，be satisfied with等，这里一定要用 be V-ed 的形式吗？有没有 worry about，satisfy with ...
—When ____ the next train leave for Boston,please?—Usually at 13:15 but because of a small accident on the line,it ____ at 13:45.A.dose; is going to start B.will; startsC.will; is to start D.dose; will start第一个空和第二个空问什么？谢谢！！
Over them I placed a number of my broadcast scripts, each page of which had been stamped by the military and civilian censors as passed for broadcast.教材上说 as 是做 each page of which 的主语补语，那么 as 是介词还是连词？as 后面可以跟过去分词 passed 吗？