【单选题】

LEARN KEY SKILLS FOR YOURCOMPUTER - ON YOURCOMPUTER

Computers are now as commonly used in business as the telephone. Therefore, it’s important that people know how to use (29) efficiently. Now, you and your whole organisation are able to do this in the simplest way possible (30) learning and practising on your own, with (31) wide range of courses at beginner, intermediate and advanced level onCD-ROM. The person (32) appears on the screen acts as your teacher, (33) you through the tasks and explaining everything. Then (34) difficult exercises allow you to practise the things you (35) learned and test your understanding.
(36) courses are excellent value - only ￡69.99. You (37) save yourself money if you buy the complete collection of seven courses. This is now available (38) the retail price of ￡410. You can make a further saving (39) 10% by ordering the complete collection (40) the next thirty days.
A．which
B．who
C．what