Directions: Write a reply to this business letter.

Office Supplies Company ABC Engineering Company,

222 Nathan Road 77 An Nei Jie, Wuhan

Kowloon, Hong Kong 17th January

Dear Sir/Madam,

I saw your advertisement in China Daily for your new fax machines. Would you please send me more information and a price list. I would also appreciate a visit to one of from sales people in the near future to discuss our requirements for business machines. Thank you.

Yours sincerely,

Li Wei

You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead.

DDR2的内存，在一个时钟周期内能够以______倍外部总线的速度读/写数据。

A．1
B．2
C．4
D．8