it's friendly ____ others when they are in trouble A.for us to help B.of us to help

问题描述:

it's friendly ____ others when they are in trouble A.for us to help B.of us to help

应该选 B对于我们来说当别人有麻烦时帮助他们是友好的.friendly 是用来说明 我们(us)的.即有这样 的关系:We are friendly .形容词+for sb to do sth 在这个结构中 形容词是用来说明事情的形容词+of sb to do sth...