Мне пришлось принять его приглашени

Мне пришлось принять его приглашение так как я знал отказаться было бы равносильно обиде или оскорблению

Results (English) 1:

I had to accept his invitation because I knew to drop would be offended or insulted

Results (English) 2:

I had to accept his invitation because I knew it would be tantamount to give offense or insult

Results (English) 3:

I had to accept his invitation as I knew to refuse it would be tantamount to communism or insult