Question

(d) Mohan speak assamese when he
was a boy. ( can / could )​

Answer 1

Answer:

could

Mohan could speak Assamese when he was a boy.

Explanation:

because there is written that he was a boy so this sentence is in past tense so could will be the answer.

Hope it helps you

and now I know others will copy me

Answer 2

Answer:

Mohan could speak Assamese when he was a boy