英语题额、好急

what that

it 去掉

where which

where which

which that

第一个 what 改成 that
第二个 把 it去掉
3： 去掉IN 或者把WHERE改成 Which
4: Where 改成 that
5:which改成where

this is the MP4 what（that) she wants

the e-mail i have just received it(这个it多余) from my good friend is too difficult to understand

yesterday they bisited the house in where（whitch) the hero had once lived

the young foreigner visited the place where(whitch) his parents had been to

the room which(that) we place magazines and newspapers is a reading room

1.this is the MP4 what she wants
what-which/that.
2.the e-mail i have just received it from my good friend is too difficult to understand
it去掉.
3.yesterday they bisited the house in where the hero had once lived
去掉in，或者改where为which.
4.the young foreigner visited the place where his parents had been to
去掉to
5.the room which