1. China, ______ one of the greatest four countries with ancient civilizations, is best-known ______ its great development in all the fields over the years.
A. as； as B. as； for C. for； as D. for； for
2. —Your spoken English is all very good. How do you improve it?
—Thanks. Mrs. Wang always ask us to ______ conversations in our English classes.
A. take up B. turn up C. make up D. end up
3. —______ hea [来自e网通客户端]