— How is that, Blair?— I wonder ______ it takes to be a good teacher beyond patience and a great knowledge of students.
I was ________ by the salesman whose products turned out to be much less effective.
Not a single word ________ about the way he was treated, but his unhappiness was revealed through his expression.
Alice, you’d better put the vase away ________ it gets broken.
--The first one ________ the finishing line wins the gold medal. --True!
He is a financial manager in Wall Street now, but nobody knows he ________ part-time jobs here and there for survival for eight years.