67.當你不知道那些字時，你應該查字典。
(A)You should look it up in the dictionary when you don’t know those words.
(B)You should look up the dictionary when you don’t know the words.
(C)When you don’t know those words, you should look up them in the dictionary.
(D)When you don’t know the words, you should look them up in the dictionary.