注意：此页面搜索的是所有试题
题目内容
（当代英语语法概论）
55
[填空题,0.7分] Fill in the blanks with appropriate preposition:A lot of chemicals can be derived ________ coal.
[填空题,0.7分] Fill in the blanks with appropriate preposition:A lot of chemicals can be derived ________ coal.
参考答案