do you know how much time and eff

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do you know how much time and eff
do you know how much time and effort they devoted —— such a complicate work?A to complete B to completing 选哪个

B devote to doing sth 或者是直接的devote to sth
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do you know how much time and eff Do you know how to stury better and make your stury more eff Do you know how to study better and make your study more eff 请教一道英语选择Do you know how much time and effort they devoted __ To my lover :My dear Do you know how much I love you As time How much do you know about AIDS? HOW MUCH DO YOU KNOW ABOUT how much do you know really about do you know how much i love do you know how much time i have spent on this?这句话有没有错救命how much time do you need? How do you know the time?回答