The ( ) is often used when referring to the ideas, findings and conclusions of the works written a long time ago, which indicates that the work is so influential on current thinking.
The ( ) is often used when referring to the ideas, findings and conclusions of the works written a long time ago, which indicates that the work is so influential on current thinking.
A.simple present tense
B.future tense
C.present perfect
D.simple past tense
