英語クイズ　How long . . . ?

下線部の空白を埋めて以下の hypothetical dialogue (仮想的会話文) を完成させてください。

A:     you know Paul?

B: Yes, I know him very      . We     good friends.

A: How long       you        each other?

B: Oh, for many years       we            high school.

A:           the woman that is talking to Paul over there?

B:         his sister Kate.