.–Did you see ____ English teacher? --I saw him at ____ work in the office just now.
I saw some trees the leaves of _____ were black with disease.
Their problem today is somewhat similar to _____ they faced many years ago.
Dorothy was always speaking highly of her role in the play, ____, of course, made the others unhappy.
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.