题目内容
【题目】The volunteers were busy ____ the old people in the nursing home do some cleaning．
A.helpB.helpingC.helpedD.to help
【答案】B
【解析】
句意：志愿者们忙着帮助养老院的老人们打扫卫生。
考查固定词组，be busy doing sth“忙于做某事”，动词help要用动名词形式，故答案选B。
练习册系列答案
相关题目
题目内容
【题目】The volunteers were busy ____ the old people in the nursing home do some cleaning．
A.helpB.helpingC.helpedD.to help
【答案】B
【解析】
句意：志愿者们忙着帮助养老院的老人们打扫卫生。
考查固定词组，be busy doing sth“忙于做某事”，动词help要用动名词形式，故答案选B。