Definition: to breathe out slowly and noisily, often because you are annoyed or unhappy Level: B2
漫长的一天后，他深深地叹了口气，在沙发上放松下来。
After a long day, he ___sighed deeply and relaxed on the couch.
“这太无聊了，”他叹气道。
"This is so boring," he ___sighed.
考试结束后，她如释重负地叹了口气。
After finishing the exam, she ___sighed with relief.
