I'm as strong as I __ in my young days .填was 还是 did 为什么

I'm as strong as I __ in my young days .填was 还是 did 为什么
I'm as strong as I __ in my young days .
填was 还是 did
为什么

I'm as strong as I __ in my young days .填was 还是 did 为什么
was.
I was strong in my young days.用be 动词加形容词而不是助动词加形容词.