17. The meaning of some words will change depending on the context ________ they are used.
(A) which
(B)and which
(C)what
(D)in which

The words are used In the context.

In the context the words are used

In which the words are used

In which they are used

The meaning of some words will change depending on the context in which they are used. 

有些字的意義(解釋)會隨著文章的上下文改變

in which they are used (文字被使用在文章內容之中)

6F wendy 這樣寫不好

used 和 in 不是必要放在一起的

他們兩個互相沒有關聯, 不是片語也不是常用句子.

• This method is often used (in practice .)
  在實務中人們常采用這種方法。(括弧裡的句子可刪去也不會影響結構)
• They can both be used ( in relation to distance) .
  它們均可用以表示距離。(括弧裡的句子可刪去也不會影響結構)

in which = where

• This method is often used in practice .
  在實際中人們常采用這種方法。
• They can both be used in relation to distance .
  它們均可用以表示距離。