几道关于定语从句的选择题,急!

几道关于定语从句的选择题,急!
1. In the dark street,there wasn't a single person_____ she could turn foe help.
A.to whom B.of whom C.from whom D.that
2. The tow things____they felt very proud were Jim's gold watch and Della's hair
A.about which B.of whichC. in whichD.for which
3. Have you ever asked him the reason____may explain his being late.
A. whyB. thatC. for whichD.what
4.Farming is difficult____there is no rain.
A.where B.in placeC.thatD.the place where
5.Is this park___youvisited when you came home last year?
A.where B.which C.thatD.the one
6.Is this just the city____the foreign guests wish to pay a visit____?
A.which, to B.to which, / C.that, toD.to that, /
就这6道题, 能带上一定的分析最好,限1个半小时内.
万分感谢!