—          do you usually go to school?  —By bus.

—_______ do you like to fly, economy or first class?—Economy, I think.

—I don’t suppose Jimmy could have done well in the mid-term exam last week,______?--- ______ he almost failed in the exam．

— ________ does Lucy like?— Tomatoes.

. Reading books is very important for developing the students’ understanding of the world, _______?