Not until he got to the classroom _ he had left his books in the dormitory.
Thank you very much for all you've done for me,which is ________great value to me.
Premier Wen said,“I once again emphasize that it is absolutely unacceptable to sacrifice people's life and health ________the economic development in any case.”
(2012年湖南卷,28)________ I always felt I would pass the exam, I never thought I would get an A.A.WhileB.OnceC.IfD.Until
We haven't met for years,but we still ________greetings by email on festivals.
They received a proportion of their ________from the sales of goods and services.