My brother can ________ well. He wants to join the _______ club.

Water, which seems so simple and common, is ______ makes life possible.

that___________everything in the universe

（2014山东省实验中学高三第二次模拟考试）7．Perhaps it will never be known __________ he did with those materials on the incident．

I don’t have enough money．I, _____, can’t afford to buyAudi A3 Sportback．