Einstein was famous _________ a scientist _______ his Theory of Relativity.

We can’t afford a holiday, so we’ll just have to go____.

____ the morning of my mother’s birthday, I usually help my mother do some housework.

 It was because it had been raining for several days, leading to a flood over the fields and the villages that many people fell _______ without foods and shelters.

Policemen think that where there is violence , drugs with damaging effects on kids are always ______ it．