Our teachers often encourage us that every minute we spend on studying will finally    in the near future．

I’d try even if I may fail ___  __ sit there worrying in time of trouble.

The newly-published book, which refers      basic English grammar, is      only for beginners.

He seemed absent-minded and _______ his careless playing, we lost the game.

A good husband must know how to ____ his ideas to his wife.