Question

【题目】他一生都在和慈善机构密切合作。

He devoted all his life ______________________________ the charity.

Answer 1

【答案】to working closely with

【解析】

根据句意可知，句中的动词短语是devote sth to (doing) sth把时间（钱、精力）献给某事物；与……密切合作work closely with，故答案为to working closely with。