unemployment and crime are high, itcan be assumed that the latter is due to the former

I ________ out of the classroom when I bumped into a girl literally.

Why doesn’t he buy you a drink?——I don’t know why, but it isn’t _______ he had no money

I dropped my keys in the grass, but luckily Kate _______ them.

Where is Jane— I think _____ she is in the library. She wants to borrow a book about Chinese food.