. I think I was at school, ________ I was staying with a friend during the vocation when I heard the news.
He made another wonderful discovery, ______ of great importance to science.
He’s got himself into a dangerous situation _____ he is likely to lose control over the plane.
I met the teacher in the street yesterday ________ taught me English three years ago.
Is this all that you need? If you married me, I’d give you everything you _____.
I can think of many cases _______ students obviously knew a lot of English words and expressions but couldn’t write a good essay.