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

题目详情
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
▼优质解答
答案和解析
B devote to doing sth 或者是直接的devote to sth