根据句意和汉语注释，在答题卡标有题号的横线上，写出单词的正确形式。
You must have high ___________ (标准)if you want to be a top student.
Ten years later Peter became a manager, but Jack ___________ (仍然还是)a worker.
The mother knew the death of the lovely cat made the girl even ___________ (悲伤).
Last month we played volleyball ___________ (对抗)a team from No.9 Middle School.