规则
When "and, but, or, so, yet, for, nor" join two complete sentences, put a comma before the conjunction. Do not use a comma when the conjunction joins only two verbs or phrases.
and、but、or、so、yet、for、nor连接两个完整句子时，连词前加逗号；只连接两个动词或短语时不加逗号。
✔ 正确： The plan was simple, but it worked.
✘ 错误： The plan was simple but, it worked.
→ 改正： Place the comma before "but", not after it.
技巧: Comma + FANBOYS joins two sentences. No comma when the second part has no subject (e.g. "She tested and confirmed it").
练习：10题
Which choice completes the text so that it conforms to the conventions of Standard English?
由AUSLEX原创的讲解和题目，并非College Board官方资料。SAT是College Board的商标。