Show the correct sentence Obi is a boy Obi is a girl

In the sentence "Although she often spoke to university audiences, she seldom spoke to business groups," spoke seems to be redundant. Can it be replaced with "did"? "Although she often spoke to university audiences, she seldom did to business groups." Some says "did to" is not grammatically correct, but I don't get why not, given that "did" simply replaces "spoke."

Can someone help me translate this? Perfer in english and japanese please. Thank you. 表示されている数式を計算して、半角数字で答えを入力してください: 必須（半角数字） ななタすサンハ

Hi everyone! Who can help improve my English? I can help you with Russian or just talking about something.

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What is the best ways to learn English?