试题题干
WORD FORMATION
Complete the following sentence with the proper form of the word in the bracket.
（music）The shop sells 
instruments, sheet music, tapes and CDs.
参考答案
试题解析
此处缺少形容词。
sell是动词，后接名词。instruments是名词，形容词可修饰名词，所以变music为形容词musical。
句意：这个店卖乐器，乐谱，磁带和光盘。