问题补充：
on the portrait, mother was deep in thought.
A. Fixed her eyes
B. Her eyes are fixed
C. Her eyes fixing
D. With her eyes fixed
答案：
A. Fixed her eyes
B. Her eyes are fixed
C. Her eyes fixing
(答案→)D. With her eyes fixed
解析：考查With的复合结构。With的复合结构：With+宾语（名词，代词）+形容词，介词，非谓语动词等。本句的主语是mother，如果用动词短语fix on，我们可以说：Fixing her eyes on the portrait现在分词用伴随状语，或Her eyes fixed on the portrait独立主格结构作伴随状语，及 With her eyes fixed on the portrait，With的复合结构都行。句意：妈妈的双眼盯着画像，陷入沉思。
