B
Do you know 后面加的是从句,从句是陈述句而B例外
而B把怍为wrong主语所以可以这样写
如果要选A what the weather be like tomorrow
c where he come from
D what he happened
你看一下这个吧
http://baike.baidu.com/view/138129.htm引导定语从句的关联词有who, whom, whose, that, when, where, why 和 which. 在非限制定语从句中, 只可用which, who, whose, where , when., 如果指代前面整个句子, 多用which. 例句： The dog that/which was lost has been found. （失踪的狗已经找到了。） Those who are in favor of the proposal are expected to discuss it in detail after the meeting. （有人认为那些对这个提案有兴趣的人最好是在会后再具体讨论它。） There are many organizations whose purpose is to help the homeless. （存在着许多旨在帮助无家可归者的组织。） The days when we had to rely on wool, cotton or silk for our clothes have now passed. （那种必须依赖羊毛，棉花或者蚕丝做衣服的日子已经过去了。） Air moves from places where the pressure was high to places where the pressure is low. （空气从压强高的地方流向压强低的地方。） This is the reason why he refused to help us. （这就是他拒绝帮助我们的原因。） He was born in 1976, when an earthquake struck the country. （他出生于1976年，这一年这个城镇发生了地震。） They turned a blind eye to the suffering of the people, which enraged all of us. （他们对受苦人们的漠视激怒了我们。）