During the flood many students volunteered ________ through the weekend, giving out food and water for the victims.

A．working B．to work

C．to have worked D．having worked

 

B

【解析】B考察非謂語動詞，句義：在洪水期間，很多學生自愿利用周末的時間為災(zāi)民發(fā)放食物和水。Volunteer to do sth自愿做某事。符合語境。故B正確。

 

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