Question

。

解説回答がないので、
理解できないため教えて欲しいです🙇‍♀️

[1] Though he knows nothing about music, he speaks (
7. as if he knew
1. as well as he knew
I. if he knew
. even if he knew
[2] I'm sorry I have to leave now.
= I wish I could (
7. leave
) a little longer.
1. stay
w. have left
) everything.
I. have stayed