Humanbeingsaresuperiortoanimals_____theycanuselanguageasatooltocommunicate.

Do you know the reason ____ he was late?

MrsZhangoftentellsusthatspringisthetime____peoplegosightseeing.

I can still remember the sitting room ____ I used to sit in the evening.

Ioftenthoughtofmychildhood,____Ilivedonafarm.