1 At the beginning of the next practice session,players ____

1 At the beginning of the next practice session,players _______ to work on a special skill,like passing,will work with the assistant coach.The others will play in a warm-up game.
A whom need
B who they need
C needing
D need
我选了A,但是正确答案是C
2.Joe buys and sells old books,maps,and manuscripts.The latest item he bought is a hundred-and-sixty-year-old book,_______ still in good condition.
A which has pages are
B the pages of which are
C which the pages are
D of which its pages are
我选了C,但是正确答案是B
3.The poet's latest collection of verse,_______ twenty-six poems about his native country,was well received by the critics.He himself will read from his collection at the Central Bookstore on Monday night at 8:00 P.M.
A which consisting of
B consisting of
C that consists of
D which it consists of
我选了A,但是正确答案是B 请问这句话中非限制性定语从句的前面为什么没有关系代词?
which consisting of 和 consisting of 在这句话中的意思分别有什么不同?为什么要省略关系代词which?求回答（麻烦详细点.
4.We went to the park Saturday morning,_______ the children really enjoyed.I would have preferred to stay home and do some things around the house.
A when
B which
C where
D that
为什么这道题要选B而不是C?
5.Three plans are being considered in an attempt to turn sales around in the computer company.The plan _______ on pages 3 through 59 was designed by Jim Hamilton in advertising.The other two plans were designed by the marketing department.
A describes
B is described
C described
D which it is described
我选了B但是正确答案是C,顺便求这道题所考的知识点是什么
6 I love long,lazy summer days _______ but enjoy being on vacation.
A which I have nothing to do
B when I have nothing to do
C I have nothing to do on
D where I have nothing to do then

1 先行词 players 在从句里做主要,所以连接词要用主格 who
2 答案是 B,part of which,这个是很常见的
3 答案是 B,这个是现在分词做定语,修饰 clooection.如果是非现代性定语从句,应该是 which consists of.选项A里面没有谓语动词
4 which 是指代去公园这件事,不是指代公园.
5 这个是过去分词做定语,修饰 plan.这个句子的主要是 plan,谓语是 was designed.选 B 的话,就有两个谓语动词了
6 答案是 B,修饰 days.先行词是时间,所以连接词用 when