下列关于航空活塞发动机电嘴积污的说法，正确的是（）。A.电嘴积污是由于发动机温度太高

Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

A. generous    B. statistics     C. building   D. chance    E. addition F. contribute   G. annoying     H. current      I. further    J. structure

Attracting donations is a chief concern for nonprofit organizations and projects. An effective, professional donation-request letter is a necessary tool for fund-raising. Researching possible donors and   小题1:   a database of names and organizations is one key to success, but the ability to write a donation-request letter has an even greater impact on successful fund-raising. The following are some tips/instructions.
Research potential donors via the Internet. Research small companies in   小题2:   to large foundations. Sometimes a small local company will assist you in reaching your goal. A simple appeal to a public-spirited local firm may inspire a surprisingly   小题3: donation.
Find the appropriate contact person. Address your letter to a real person who is in a position to entitle a donation. Beginning your letter with “To Whom It May Concern” or “Dear Country Market” stands little   小题4:  of attracting the attention of the right staff member.
And then,   小题5:   the letter properly. Begin your letter with a vivid and readable description of your organization’s work, and highlight a recent success story. Continue with a few general   小题6: to impress the contact person with your organization’s efficiency and effectiveness. Next, describe in full the   小题7:  project or effort for which a donation is needed and who will benefit. Include all contact information, including telephone, fax and email, and end by inviting the person to contact you if any   小题8:  information is needed. Finally, hand on the letter to colleagues for proofreading and suggestions. 
Keep careful records of donations and send thank-you letters. Donors often are willing to   小题9:  again if they are shown how their contribution was put to use. Follow-up letters can assist in this effort.