During the past two decades, research has ________ our knowledge of daydreaming.

英语翻译：他是公司的首席执行官 ,但总是平易近人。

The students are required to ________ the main ideas of the article in their own words.

Basically，these attitudes amount to a belief ________ leisure can and should be put to good use

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

英语翻译：我希望我的书将阐明我们面临的复杂问题。

_______, could you get me a Turkish conversation book?

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

That proposal is essentially irrelevant ________ the issue at hand.

Please write a report _______ the above subjects are to be covered.