As the years passed many occasions—birthdays awards graduations— with Dad’s flowers.A.

问题补充：

As the years passed, many occasions—birthdays, awards, graduations— with Dad’s flowers.

A. are marked

B. were marked

C. have marked

D. had marked

答案：

A. are marked

(答案→)B. were marked

C. have marked

D. had marked

解析：主语是many occasions，所以谓语动词要用复数式，be marked with是固定搭配，“。。。有什么印记”，用法如同be filled with\be lined with\be crowded with等一样，又如：His face is marked with grief. 他脸上有忧伤的痕迹。