How I wish I ________ in medicine instead of historywhen I was at college!

Believe it or not, my sister and I are twins. — Oh, you must have had the case _____you were taken for your sister. [ ]

The house rent is expensive. I’ve got about half thespace I had at home and I’m paying _______ here.

Many people took part in 10,000-metre race, but only ____________ them kept on running to the end.

When I entered the room, I found a little boy _____ on his mother’s knees _____ to draw a picture. [ ]