[单选题](单选题)房水产生的部位是
A. 虹膜
B. 晶状体
C. 玻璃体
D. 睫状体

Reading is very important to help you learn English. To learn as much as you can from reading, you need to read different kinds of English. This book provides not only different kinds of English but also a good way to check your reading ability.
There are four parts in the book:
Part 1 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 2 is People: In this part all the tests are about people. For example, there is an informal letter between friends. There is formal (正式的) English in biography (传记). There is a job application as a model to help with your writing, as well as testing your reading.
Part 3 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.
Part 4 is Things: You will f
A. part 1
B. Part 2
C. Part 3
D. Part 4

Invitations to very formal dinners may be engraved or written by hand in the third-person style. Less formally, they are written on notepaper or an informal note. The typeface is a matter of personal choice. For less formal occasion the attractive, decorated, preprinted invitations available at stationers and card stores are perfectly acceptable and practical.
Punctuation is used only when words requiting separation occur on the same line, and in such abbreviations as "R.S.V.P. ". The time is never given as nine-thirty, but as half after nine o’clock or half past nine o’ clock.
If the event is to be given at one address and the hostess lives at another, her address should appear below the R. S. V. P., assuming that she wishes replies to go to her home.
If the party is formal, the phrase "black tie" or "white tie" appears in the lower fight-hand comer of the invitation.
Invitations should be issued b