In American schools where students are trained to be creative, some Asian students fail to ______ the creativity they’ve developed and take tutoring classes to raise their points on SAT.

Wind is now the world’s fastest growing ________ of power.

People complain that decisions to approve or deny a permit are often ______ rather than based on fixed criteria.

The boss _______ company I worked in two years ago has ______ in solving such kind of problem.

The more one is ______ the English－speaking environment，the better he or she will learn the language.