________ happens in the world makes us happy and sad too.

A. That         B. What               C. Which                    D. Whether

B  


解析:

       題意:世界上發(fā)生的事使我們高興也是我們悲傷。本題考查引導(dǎo)主語從句的連接詞。that引導(dǎo)主語從句只起連接作用,在從句中不作任何成分,無意義,但不能省略。what除引導(dǎo)主語從句外, 還在從句中作成分。which指一定范圍內(nèi)的“哪一個”;whether意為“是否”。根據(jù)句意“世上的事喜憂交替”可知答案為B

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