If you can't dig into the field you have chosen for your pursuit, it is hardly possible for you to achieve anything significant in the field（）.

The old man sat before the fire in a trance, thinking o...

单项选择题The old man sat before the fire in a trance, thinking of his past fife（）.

The sense of mistrust is compounded by smaller annoyanc...

单项选择题The sense of mistrust is compounded by smaller annoyances that leave the families feeling as though no one in authority cares about them（）.

She embellished the simple dress with colorful embroide...

单项选择题She embellished the simple dress with colorful embroidery（）.