填空题 Directions: After reading it, you should give brief answers to the 5 questions (No.56 to No.60) that follow. The answers (in no more than 3 words) should be written after the corresponding numbers on the Answer Sheet.
REA'S Problem Solver Books
(1) Designed to save students hours of time in finding solutions to problems.
(2) Include every type of problems that might be given in exams.
(3) All problems are worked out with detailed step-by-step illustrations (说明).
(4) They are essential supplements (补充) to all class texts.
(5) Over 1,000 pages in each book.
(6) Each book is the first of its kind ever produced in its field.
Outlines of each book are given on the inside pages of this announcement.
If books cannot be ordered through your teacher, use the ordering form attached to this announcement and mail it directly to us at REA (Research & Education Association). PEA makes it a point to fill orders from teachers and students immediately. If you are not satisfied, for any reason, you may return the book within 30 days after you receive it, and we will give a full refund (退款).

填空题 What can you find in REA's Problem Solver Books? ________________________ to problems.

填空题 What kind of problems can be found in the book? Those that may be given in ________________________.

填空题 How thick is each book? More than ______________________________.

填空题 What should you do if you cannot get the book from your teacher? You may use the ________________________ attached to the announcement.

填空题 What's the time limit for you to get a full refund ? Within ______________________________ after you receive the book.