—Tom has never visited the Great Hall of the People, _____?—He went there last month．

－Can you tell me how many colours _______ in a rainbow?－Seven.

--- There is little water left in the bottle, ______? --- No, we need to buy some more before we run out of it.

You've just finished your listening exam. Please get yourself ready for the next part,       ?

—    is your brother going camping    ?—His  friends.