It has been found that a strong ________ help overcome the effects of distraction.

That proposal is essentially irrelevant ________ the issue at hand.

I understood from her that you undertook other important work ______.

When _______, water will be turned into steam.

________，he had no time to rest.

Robots differ from automatic machines ________ after completion of one specific task，they can be reprogrammed by a computer to do another one.

People who can ’t _______ between colors are said to be color -blind.

A year later，with the nation’s economy ________，Bush’s approval rating dropped below 40 percent

It is vital that the work _______ in time.

This is the most beautiful village _______ I visited these years.