expect for 与expect的区别

1)Except后排除的内容与主语往往是同一类的,而exceptfor后所排除的内容与主语往往不是同一类的.例如,试比较:
All the buildings are excellent except this one.
All the buildings are excellent except for their location或者All the buildings are excellent except that the place on which the buidings are built is notgood.
2)当except用在句首时往往改用exceptfor.例如:
There was no single person in the dark street that night except apoliceman on his duty.此句相当于:
Except for apoliceman on his duty,there was no single person in the dark street that night.参考资料：http://zhidao.baidu.com/question/2643990.html

第一题 选C 是指除了他之外，其他人都去了沙滩 而 B 的意思是除了他之外还有别的同学到沙滩去与前面的disappointed， A 的意思是 期望的意思 与原文不符合， but是连词 后面最好是加句子。
第二题选 B ,但是这个句子是不是有问题呀，怎么感觉好像有错误呀...

第一题旳意思是：大卫失望地发现他的同学们去海边,没有等他所以选c
第二题的意思是：年纪大的人承认没有早起的优点之一是它被退休 选b