Question

【题目】— What do you think of the science exam?— Very difficult! We all find ______ the most difficult one we have ever taken.
A.this
B.that
C.it
D./

Answer 1

【答案】C
【解析】句意：-你认为科学考试怎么样? -非常难! 我们都发现它是我们考过试题中最难的。it人称代词，指代上文的科学考试。所以选C。