I'm sorry to have you waiting so long for Marcia, and I'm afraid it'll be ten minutes she comes back.A. before B. after C. until
_____ he is ill, _____ he still goes to work.
-----_____ do you exercise? -----Once a week.
Which is _____, the sun or the moon?
Lily and Lucy are twins, they _____ good girls, they often help others.
Your book is easier than _____.