题目

It is often ______ that human beings are naturally equipped to speak. A. said       B. to say     C. saying     D. being said 答案：A 解析:考查的是固定句型(it is +Ved +that从句)。如图是我国春秋战国时代的乐器--编钟，敲击编钟，编钟因________发出声音，用同样大的力敲击大小不同的钟，编钟能发出不同________ 的声音．