问题补充：
She didn’t finish her homework yesterday evening because she worked too .
A. quietly
B. clearly
C. slowly
D. politely
答案：
A. quietly
B. clearly
(答案→)C. slowly
D. politely
解析：quietly安静地；clearly清晰的，明显的；slowly慢慢地；politely有礼貌的，客气的。句意：昨天晚上她没有完成作业，因为她写得太慢了。结合语境可知选C。
