Are these statements correct?

1. Greg won't even consider changing his diet unless he is convinced (so advised? persuaded?) by his doctor


2. Had the frost hit later, this year's expected (upcoming?) peach harvest might have been lesser (smaller? curtailed? disappointing?)

3. Linguists at a recent congress in Seattle have warned that fully half of human languages might disappear by the end of the century as smaller societies are assimilated into national and global cultures.


Okay Kets but why

1. fine
2. expected/anticipated
3. warned/predict

So you think the statements are correct?

We don't know Greg, so we cannot say if the first statement is "correct". Did you mean "grammatical"?

First of all, these sentences come from this year's English competition in my country. I really need to know if what i have written previously is proper, so that's why i had to ask somebody who is fluent in English.First of all, in the sentence 2, there has to be "might be" because it is given in the answer key But what about the sentence 3? You think it is okay to give there " are getting assimilated"? Because in the answer key there is " are assimilated" but it seemed to me that my answer was proper but i wasn't sure of it and i had to ask about it. But i still also wonder about the sentence one because i'm still confused because when i translate it into my language it seems okay to me. The only person who could, maybe, make Greg change his diet is his doctor - this is the sentence, which had to be changed but it couldn't mean something different after the change. And I change it this way: Greg doesn't even consider changing his diet unless he is convinced by his doctor. And i don't know if it's proper but in my opinion it should be I'm looking forward for your replies beacuse my competition result depends on it And i meant grammatical:D

They are correct based on the emphasis of the words used.