基础导练
Ⅰ. Fill in the blanks with unless, as soon as or so...that.
1.除非你努力，否则你的梦想将不会实现。
Your dream won’t come true _____you work hard.
2.我一到北京就给你写信。
I will write to you _____ _____ _____ I arrive in Beijing.
3.科学家的报告很有启发性，我们感到很兴奋。
The scientist’s report was _____ instructive _____ we were all very excited.
