Hard work is no     of an excellent school record．You have to adopt a flexible approach to your learning．

Such men have made＿＿＿＿＿by developing oil businesses．

Parts of the cave have been badly affected by rain and           to the air.

Prince William, marrying Kate Middleton, has become a public         again.

The teacher suggested we do the exercises with great ________ though they were easy.