试题题干
WORD FORMATION
Complete each of the following sentences with the proper form of the word in brackets.
Digital technology is capable of restoring the
signal. (origin)
参考答案
试题解析
此处缺少形容词。
the是冠词，signal是名词，形容词修饰名词。所以变origin为形容词original。
句意：数字技术可以存储原始信号。