问题补充:
单选题Friendshiphelpsusunderstandweare,weneedeachotherandwecandoforeachother.A.what; why; howB.who; how; whatC.who; what; whyD.who; why; what
答案:
D解析考察宾语从句。Understand后面有3个宾语从句:who we are(我们是谁;who做表语);what we need(我们需要的东西;what做need的宾语);what we can do(我们能做的;what做do的宾语);故D正确。