1. “Susan looks ready to cry”._ “It looks as if Peter _______ her birthday again!”
A had forgotten
B has been forgetting
C has forgotten
D had been forgetting
I chose A but the answer is C. I don't know why present perfect sense works here
It's about the matching of tenses.
The present tense looks goes with the present perfect has forgotten.
The past tense looked would be needed to go with the past perfect had looked.
“It looked as if Peter had forgotten her birthday again!”