The question was so ________ that there was a ________ expression on the teacher's face.
—We'd better hurry; we'll be late. — __________. Do you really want to listen to the boring lecture?
. Mr Black was much disappointed to see the computer he had had _______ went wrong again.
They _______ on the program for almost one week before I joined them, and now we on it as no good results have come out so far.
Few pleasures can equal _______ of a cool drink on a hot day.
—Mom, what did your doctor say? —He advised me to live _______ the air is fresher.