It is no use _________ to persuade him ________ smoking because he has been addicted to it since he wasyoung.
---Laura can’t come for dinner. She’s leaving for Beijing tonight. --- _____. I hope I can talk to her soon.
It’s important to write these goals down______ merely think about them.
Regulations _____ that students attend at least 90% of the lectures.
It’s ten years since the scientist ___on his life’s work of discovering the valuable chemical.
Although there are no classes in the afternoon now, no student ______ go out of school without the head teacher’s permission.