Chaired
vt. 主持（chair的过去式与过去分词形式）
🗣️ 情景例句
I have been a poor student of foreign languages.
外语就学得不好。
He is up to his ears in debt.
他债台高筑。
America, Russia and Europe are filled with enthusiasts----
美国、俄罗斯和欧洲都有许多热心此项事业的人