、If the restaurant failed to make enough money, they would
-What did you think of ______ president?-I didn’t care for him at first,but after ____ time I get to like him.
Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
How pleased the detective was _____ what his customer told him!
Mrs. Brown was much disappointed to see the washing machine she had _____ went wrong again.
-Has Tommy finished his homework yet?-I have no idea; he ____ it this morning.