---Now, children begin to learn English at a very early age. It is really a good thing?---_________.

— I get at least half an hour of exercise almost every day.— Oh great!         .

—This is English Department of Beijing University.—Hi,I’m a student in English Department.I need to know the foreign professor—Mr.Smith’s email address.—__________.I’m sorry,Mr.Smith does not have an email address in our system.

——The book isn’t easy for Jack to understand, is it?——____. His foreign language is far better than expected.

--- I’m sorry I have broken your teapot.　--- ______.