Question

——It’s generous ________ Millie to donate all her pocket money to UNICEF．
——Yes．It is really meaningful _________ us to do something for charities．

A．of；of

B．for；for

C．for；of

D．of；for

Answer 1

D

“It is + adj.+ of sb.+ to do sth”句型中的adj.跟sb.有關,這個adj.是用來形容sb.的,表示某人這么做真是太adj.了，故第一空用of；而“It is + adj.+ for sb.+ to do sth”表示做某事對某人來說很adj.，這里的adj.是do sth的屬性，里面的sb.跟adj.沒有直接聯系，故第二空用for。故根據句意選D。