You should never base anything on a theory that _________ impractical in practice.  

 There_________still some milk in the fridge. It’s not necessary to go to the store today.

Everyone, including my parents, ____ going to be at the party.

―Why are you in such a hurry, John? ―There ________ a basketball match between Class Three and our class in ten minutes.

Swimming in the pool with the children ________ very interesting.