The word “hiking” is a noun here.Originally Posted by imany
To agree to something is to give permission for something to be done; to agree with something is to be in favour of something. So, “will you agree to it?” is a request for permission for the plan to go ahead. OTOH, “will you agree with it?” sounds a bit odd to me. If you are asking the other party whether they agree with the statement “many people like my plan”, you can just say “will you agree?” or “do you agree?”.Originally Posted by imany
The first one is right; the second one is wrong.Originally Posted by imany
Neither. The correct answer should be:Originally Posted by imany
Tomorrow is Mary’s birthday. Let’s celebrate it.
Tomorrow is Mary’s birthday. Let’s congratulate her.