题目内容：

7B的几道英语题目,要详解,答得好再加分
1.Behind Sandy and ________,there's a bookshelf.
A.I B.my C.me D.mine
为什么选c用I
2.The students are planning to take a ____________to Nanjing.
A.five days' trip B.five-days C.five-day-trip D.five-day trip
为什么选d.
3.Some of the work _____________________.
A.is hard enough for me to finish
b.is too hard for me to fish
c.are too easy me D are too easy for us to finish
为什么选B
4.each of
第一题的答案能否再详细一点?
1.“介词后面用宾语”那and是宾语吗?
2.C
宾语,其他不通,my：我的；mine是my的宾语格式
那请问I那?