Since 1985. a)hadn't seen b)didn't seen c)haven't seen d)never saw

listen, ivan singing in the room.

he doesn't see that i look at it, as he reads something with a great interest.

call him now. i think that he doesn't sleep yet.

look at the person who sits at a window. he/she is our lawyer.

1. yes ofcourse, its important part of school life, and especially for discipline.

2. we have primary and high schools, and some private schools