The answer key says that annual has to be changed to biannual or semiannual. I think using biannual is plausible, but why semiannual? I think semiannual means twice a year right? Please advise.
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If it is an annual conference, it is held once a year. So, I think the original sentence isn't logically correct.
If I say the biannual conference or semiannual conference happens every other year, to me it sounds like they are held twice every two years. I think I am lost here. Doesn't every other year mean every two years? Please advise.
Biannual - lasts (occures) half a year = 6 month
Semiannual - occuring twice a year
Lcchang So in this sentence, the best word should be biennual. Is it correct? Please advise.Yes, but it's quite rare, and confused with biannual, as mentioned by Goodman. I'd let the original sentence as it is, just to avoid confusion. But your call.
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