— I wonder how much you charge for your services.— The first two are free _______the third costs $30.
Some of you may have finished unit one.________, you can go on to unit two. A.If you may B.If you do C If not D.If so
Not until he left his home __________ to know how important the family was for him.
The reason __________ he explained is not __________ I expected.
--- Do you enjoy your present job? --- _________.I just do it for a living.
Everyone in our class was working hard and doing what we could _______ a good university.