试题题干
Word Formation
Complete the following sentence with the proper form of the word in the bracket.
(relief) He smoked frequently to 
his nervous tension.
参考答案
试题解析
此处缺少动词。
to+动词原形表示目的。relieve one's tension意为缓解紧张感。所以变relief为动词relieve。
句意：他经常抽烟以缓解紧张情绪。