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。

Boys, don’t lose____ in playing Angry Birds. It is badfor your eyes to play computer games for a long time.

It is wise to have some money ________ for old age.

The child is a bit slow, but______________he is a good student

, please send us postcards ______ we’ll know where you have visited.—No problem.