Question

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

 

Answer 1

B

【解析】B考察非谓语动词，句义：在洪水期间，很多学生自愿利用周末的时间为灾民发放食物和水。Volunteer to do sth自愿做某事。符合语境。故B正确。