All of us found ______ difficult to work out the maths problem.

Kitty has three cousins. ______ of them like playing football.

________ wise nation is one good at learning, especially ________ that is good at learning from difficulties.

 — Would you like to go to the cinema with me this evening？— I’d like to, but I won’t be free tonight. Let’s make ____ some other day.

Science is more than a collection of unrelated facts; to be meaningful and valuable, ______ must be arranged to show generalized character.