Can you tell the ________ difference between the words “require” and “request”? I sometimes get puzzled by their meanings.

填入横线的关联词语最恰当的是（ ）人与蜜蜂不同的地方，就是人在建筑房屋之前，思想里已有了房屋的图样。我们要建筑革命这个房屋，____须先有中国革命的图样。____ 须先有一个大图样、总图样，____须有许多小图样、分图样，____这些图样____别的，____我们在这个革命实践中得来的关于客观实际情况的能动的反映。

Help others in need, ______they will help you when you are in trouble.

She says that she’ll never forget the time ________ she’s spent working as a secretary in our company.

Though he is ___________ at home ,he doesn’t feel _________ for he has many things to do.