问题补充：
Students should always remember theory and should not at all be from practice.
A. divided
B. stopped
C. separated
D. operated
答案：
A. divided
B. stopped
(答案→)C. separated
D. operated
解析：动词辨析. A.分开;分裂B. 停止;阻止 C.分开;分离,D.操作. divide 划分；把整体分成若干部分， separate有‘分割’成两份的意思，有时会与from连用表示 ‘分裂’的意思。 根据题意学生应该永远记住定理,一点也不应该和实际脱节.故选C.
