1 . 汤姆昨晚一定熬夜到很晚。他是那么困以至于刚才我们在一起唱歌的时候他睡着了。
Tom________ last night. He was________ he fell asleep when we sang a song together just now. (must)

2 . 第一次写论文时，她的导师向她解释说，如果引用他人的观点就必须要注明，不过他主要还是想了解她本人的观点！
________, her tutor explained that ________ if she cited their ideas, but that he mainly wanted to know what she thought!

3 . If you ________ to a key college, your English must be excellent.  
如果你想上重点大学, 你的英语必须很优秀。

4 . (2016·天津高考书面表达)It has been two weeks ________ you came to our school for the exchange program, which has benefited all of us.
你来我们学校参加交流项目已经两个星期了，我们大家都受益匪浅。

5 . 我是在读到他写的诗时开始欣赏这些建筑的美的。(强调句型)
________________ I began to appreciate these buildings' beauty.