---Where has Mary been? I haven't seen her all day?---Oh,in order not to be disturbed, she spent the whole day __in the study, ___ her report.
I____see him yesterday.
Is there any thing else____you want to get ready for the party this evening?
____on Monday night that all this happened?
It was in the school____he had studied____he began the important experiment.
It is the teacher____taught me when I was a child____I am going to visit.