括号前为正确答案，括号中为我选的
1.we really like_____when stevenson offered to help us out of trouble.
a.that b.it c.what d.him b(a)
2.at______dawn in ____dark 填何冠词
3.______hearing the good news, they jumped with joy.
a for b in c upon d at c(a)
4。the journey that_____change Tom's life started in july that year.
a.would b.was going to c.was about to d.was to d(why?)
5.christmas is just _____the corner.
a.near b.at c.around d.round d(c)

1.B 这里的it代替when...引导的这种情况，是名词性从句的特殊用法。再如：I hate it when people are talking with their mouth full.
2. at dawn, in the dark
3. C on=upon 表示：“一。。。就。。。”on 用在现在分词前面，强调从句和主句发生的时间几乎同时。
4.would表示意愿，be going to 强调动作的计划性，be about to do 后边不加任何时间副词，所以只有be to do,表示将来时，在此处强调：“注定”。
5.C/D都可以，表示：“将要到来”。

顺便说一句，因为爱国才要学好英语啊！否则怎么把我国的优良传统传播出去，又怎么能吸收国外的先进技术呢？