Medcial erperts say the most effective way to prevent the spread of disease is for people ______their hands with soap and watera to wash b washed c washing d being washed要知道理由
问题描述：
Medcial erperts say the most effective way to prevent the spread of disease is for people ______their hands with soap and water
a to wash b washed c washing d being washed
要知道理由
答
a.to wash (hands)
b washed 是被动,故去时态
c washing 是正在进行时态
d being washed 是被动,比别人洗涤 同时