Question

Each of the following sentence has a mistake in the relative clause. Find the mistakes and correct them. Don`t change the punctuation of the sentence.
  1 the thing which I value it the most is my grandmather s necklace.
  2 he explaned all what his father had told him to do
  3 that s the house where I used to live in
  4 Whose does this book belong to?
  5 I can do everything what you can.
  6 I eant to go to Waless, where my grandfather was born there.
  7 students which want to go on the trip should sign up now.
  8 anyone who he  wants to return by bus must pay 5.00$
  9 Alison is someone whom I think would do the job well
  10 the girl, that I d seen before in the restaurant, was dressed in black.

Answer 1

The thing which I value the most it is my grandmother's necklace.
He explained all what his father had told him to do.
That's the house where I used to live in.
Whose this book does belong to?
I can do everything you can do.
I meant to go to Wales, where my grandfather was born.
The students which want to go on the trip should sign up now.
Anyone who wants to return by bus must pay 5.00$
Alison is someone who I think would do the job well.
The girl, That