7A, p.147c too / enough; so / such. EMPOWER UI

They went by plane because they're rich. (that)

They're _____ they went by plane.

I'm so sorry that we didn't see you. (pity)

It's _____ we didn't see you.

He's too young to be a doctor. (old)

He isn't _____ be a doctor.

I didn't go out because I was so tired. (too)

I was _____ go out.

That footballer is so good that he plays for his national team. (such)

He's _____ he plays for his national team.

It was such a serious situation that they had to call the police. (so)

The situation _____ they had to call the police.