Question 30: Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. Question 12. He was not at all interested in what was going on around him, but insisted _________back to his country on the first sight.
Knowledge of the passive of gerunds
to insist on st/doing st: insist on something
The sentence has a passive meaning, so we choose D
He was completely unconcerned with what was going on around him, but from the very beginning he insisted on going back to his country.
Other structures to note:
to insist one’ doing st
to insist that + S + V(bare): insist
to go on = to continue: continue