请教几道关于英语定语从句连接词选择的问题

请教几道关于英语定语从句连接词选择的问题(B)1、Is this the bank ____ foreign friends often exchange their money?A、that B、where C、which D、the one不是没有先行词吗?我觉得应该用the one来作为先行词啊?(B)2、This experiment wiill test how _____ can be used in other contexts.A、how you have obsered B、what you have obsered C、that you have obsered D、how that you hace obsered(A)3、All the pupils could get the book except _____ who had already had.A、the ones B、ones C、some D、the others为什么要加the啊?(A)4、It was 1969 _____ the American astronaut secceeded in landing on the moon.A、that B、which C、when D、in which为什么不能选C?(A)5、The hotel ______ for the spring holidays stands by a nice lake.A、we stayed at B、where we stayed at C、we stayed D、in that we stayed为什么不选C?有了介词不就不能省略引导词了吗?(D)6、Is it the factory ______ "Red Flag" cars are produced?A、in which B、where C、which D、that为什么不能选AB?我觉得AB也没有错啊!(A)7、Under the bridge,however,almost directly below,_____ was a small canoe,with a boy in it.A、there B、where C、here D、which为什么不选B?(D)8、They show great interest _____ you will tell them.A、in which B、in that C、all that D、in everything为什么不能选A?有in everything这样的说法吗?