he asked me------- i was busy with those daysA thatB ifC whatD why为什么

he asked me------- i was busy with those days
A that
B if
C what
D why
为什么

C
what引导的疑问句做ask的宾语补足语,
what 做with的宾语.
所以排除BD,这两个选项都是副词无法做宾语
Athat 意思不符合.没有疑问的意思