Instead of thinking about it, there is no answer. It is better to ask the teacher directly.
确
定
què dìngdefinite; certain; fixed; to fix (on sth); to determine; to be sure; to ensure; to make certain; to ascertain; to clinch; to recognize; to confirm; OK (on computer dialog box)
我们 开会 的 时间 已经 确定 了 。
wǒ men kāi huì de shí jiān yǐ jīng què dìng le.
The time for our meeting has been fixed already.
苦
恼
kǔ nǎovexed; distressed
在 我 苦恼 的 时候 , 她 来 安慰 我 。
zài wǒ kǔ nǎo de shí hou, tā Lái ān wèi wǒ。
She comforted me in my distress.
无
奈
wú nàihelpless; without choice; for lack of better option; grudgingly; willy-nilly; nolens volens; abbr. for 无可奈何
他 对 生活 感到 很 无奈 。
Tā duì shēnghuó gǎndào hěn wúnài.
He feels powerless about his own life.
垂
头
丧
气
chuí tóu sàng qìhanging one's head dispiritedly (idiom); dejected; crestfallen