He argued endlessly with him on the subject.

Options

A. (1) argued on and on
B. (2) argued all the time
C. (3) argued continuously
D. (4) No Improvement

Answer

D

Explanation

No Improvement endlessly (Adv.) : in a way that continues for a long time and seems to have no end
She talks endlessly about her problems on and on (Idiom) : without stopping, continuously
She went on and on about her trip. all the time (Idiom) : the whole time
The letter was in my pocket all the time.