When and where this took place _____ still unknown.
To make your work easy to solve, you can______ with one other class member if you want.
----May I come in and have a seat?----______, make yourself comfortable.
Students are selected for scholarships ______an open, national competition.
The film has had ______reviews from the audiences, because not everybody thinks highly of it in the survey .
-----Do you all feel like going out tonight? ------_______, everything depends on you.