The children have gone to far-off countries

Hi teachers,

The children have gone to far-
off countries and are engaged
in their work. Please correct it.

Does it need any correction? I don’t think it does.

Thank you.

Anglophile,
For
“The children have gone to far-off countries and are engaged in their work.”
can I say :
“The children have gone abroad and are engaged in their work.”?

Yes, and although there is no indication of how far away they now are, this is probably the more natural option of the two.

You can say so, but ‘abroad’ and ‘far-off countries’ do not mean the same. When you say ‘far-off’, you naturally do not mean your neighbouring countries like Sri Lanka, Nepal, Bangladesh etc.