21. Jack must hand in the order list to his boss by ______.
A. the first day of last August B. the last working day of this month
C. the last day of next August D. the first working day of each month
22. If Jack wants to buy the books about success, he should order them from ______.
A. Homeland Ltd B. Founders Company Ltd
C. Oscar World Ltd D. New Times Publishing Ltd
23. Which book sold best according to the text?
A. Homeland English B. Good Health in 20 Days
C. Biology at a Glance D. How to Become Successful
