Complete each of the following sentences with a (compound) word derived from the one(s) given in brackets.
Today, oil and ( ) gas have replaced coal and wood in these areas. (nature)
【正确答案】:NATURAL
【题目解析】:
名词gas前面加形容词进行修饰。nature是名词,其形容词形式需加形容词后缀-al,即natural.