Born and raised in Africa, I hadalways taken my African origin as a burden. My self-dislike was further fueledwhen my family had to relocate to Norway, where I attended a high school. Compared to allthe white girls around me, with their golden hair and delicate lips, I, a blackgirl, had curly hair and full, red lips. My nose often had a thin sheet ofsweat on it, whatever the weather was. I just wanted to bury myself in my shellcrying “I’m so different!”
What also contributed to my self-dislike was my occasional stuttering , which had weakened my self-confidence. It always stood between me and any fine opportunity. I’d taken it as an excuse to avoid any public speaking sessions, and unknowingly let it rule over me.
上面的内容摘自2022年高考考试英语天津卷（第二次）的阅读理解B。
问题：上面的 attend a high school 为何要加冠词？不是应该说 attend high school 吗？又如：go to school,come to school 等。
