“__ you’ve made! But you should work still harder,” the teacher said to the boy.

下列诗句与“落木云连秋水渡”对仗工整的一项是 （ ）

下列各项中，成语使用恰当的一项是

You never know you need it _______you lose it.

In the year 2012, the African­American tech workforce reduced from 28 percent to 23 percent, while Asian tech employment saw a ________ small decrease from 46 percent to 42 percent