问题补充：
The subject I am most interested is English.
A. in that
B. that
C. in which
D. which
答案：
A. in that
B. that
(答案→)C. in which
D. which
解析：考查定语从句。定语从句in which I am most interested修饰先行词the subject. that不能放在介词后面。句意：我最感兴趣的学科是英语。
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