他疲惫地叹了口气，倒在沙发上。

He ___sighed tiredly and collapsed onto the sofa.

他叹了口气，放下沉重的书包。

He ___sighed deeply and put down the heavy backpack.

他叹了口气，放下了沉重的书包。

He ___sighed and put down the heavy backpack.

风在松林间叹息，发出轻柔的声响。

The wind ___sighed softly through the pine trees.

她看着毕业照片叹了口气，怀念起学生时代的美好时光。

She ___sighed as she looked at the graduation photo, missing the good old school days.