单项选择题
Although he did not feel well, he insisted ______ going there together with us.
单项选择题 Most of the retired people are happy ______ their quiet life in the country-side.
单项选择题 My brother lent me many reference books, but ______ of them was of any use for my report.
单项选择题 I don"t regret ______ her what I thought about her proposal, even if it upset her.
