—Its six oclock and your father is still at the office.—I know,

—Its six oclock and your father is still at the office.—I know, who else would _______ he does?
A、be as hard working as
B、as working harder than
C、do harder work than
D、work as hard as
【正确答案】：D
【题目解析】：as + adj +as 和……一样