英语高手请选择并说明原因.困惑ing

英语高手请选择并说明原因.困惑ing
1、People choose to learn things that are practical,and do things that are _____.
A.available B.profitable C.successful D.helpful
2、As a result,many college students choose business,law,or computer programming as their majors,convinced that these professions are _____ the big money is.
A.what B.how C.why D.where
3、Sometimes happiness enjoyed alone is a pleasure,so is sorrow tasted _____.
A.proudly B.publicly C.privately D.passively
4、Indeed,as the competition in the job market gets more and more intense,students do have reasons to be _____.However,if the idea exists on campus,wh will see university is training out well trained spiritless working machines.
A.practical B.selfish C.confident D.nervous
感觉 “习羽寒 ”不负责任。“YANZI0371”翻译得很棒，“王三麻子 同时还谢谢“Eaturheart 分数只能给一个，只能对其他朋友说谢谢！
我个人觉得4小题A、D都很有道理。