【单选题】The library of congress in Washington, D.C. which 【C1】______ the largest collection of books in the world, is fighting a battle against paper deterioration. The 【C2】______ of the old books, often yell...
【简答题】To be a successful speaker, it is essential for you to know why you are speaking and what you wish to accomplish by your speech. The four most common 1 of speech are to inform, to convince, to move to...