—__________ is it to your hometown from here?— Well, it takes over three hours to get there by coach.

It was not until the 18th century that man realized that the whole of the brain was involved in the working of the mind，　　　　？

Mrs. Black doesn’t believe that her son is able to design a digital camera, ______?

—         will the foreign students be back from Qufu?—In two days.

It is impossible that you achieve your goal without effort,         ?