(69)                   

A As  it should be realized that today the syllabuses are extensive, a student cannot expect to pass an examination by relying entirely on his memory.

B Not only should  it be realized that today the syllabuses but also are so extensive that a student cannot expect to pass an examination by relying entirely on his memory.

C But it should be realized that today the syllabuses are so extensive that a student cannot expect to pass an examination by relying entirely on his memory.

D Beside  it should be realized that today the syllabuses are so narrow that a student can expect to pass an examination by relying entirely on his memory.