单项选择题

Reading is very important to help you learn English. In order to learn as much as you can from reading, you need to read a variety of English. Not only does this book provide different kinds of English, but also it puts forward a good way to check your reading ability.
There are altogether four parts in the book, and they are as follows:
Part One is Messages: In this part somebody wants to send information in writing to somebody else. There is a test on timetable and a test on text messages.
Part Two is People: In this part all the tests are about people. For example, there is an informal (非正式的) letter between friends. There is formal (正式的) English in biography (传记). There is a job application (申请) as a model to help with your writing, as well as testing your reading.
Part Three is Places: In this part, too, many different kinds of English are shown, some informal and some formal. There is the informal English of a holiday postcard. There is also the formal English in a letter of complaint (投诉).
Part Four is Things: You will find some descriptive writing in this part. There are descriptions of clothes and of a computer.
You can do these tests in any order you like, or you can do all the tests with a formal or informal text. I enjoyed writing this book and I hope you enjoy using it. The passage is most probably written for ______.

A. students
B. test designers
C. test takers
D. teachers