I was reading a novel when they _______ to see me.
I was reading a novel when they _______ to see me.
(A) were coming
(B) come
(C) had come
(D) came
I was reading a novel when they came to see me.
In the sentence, the completed action of “they came” interrupts or coincides with the ongoing action of “I was reading.” Because the action of “they came” is not yet complete, the action remains in the simple past tense.