<p>We all agreed (<strong><em>) the decision to go skiing rather than hiking.
It was hard not to agree (</em></strong>) her offer of a free movie ticket.</p>
<p>Agree on/to/with/upon
which one do you ues?
and why? and when?</p>
<p>I think you "agree with" people (ex: I agree with her), "agree to" doing something (She agreed to help me out) and "agree on" when making decisions (We agreed on a location for the party).
In your sentences I would say:
We all agreed to go skiing rather than hiking.
and
It was hard not to accept her offer of a free movie ticket.</p>
<p>Hope that helped.</p>
<p>well actually the fist question;s answer is "We all agreed (on) the decision to go skiing rather than hiking. "</p>
<p>and I was thinking the same thing, can I say "We all agreed (to) the decision to go skiing rather than hiking"??</p>
<p>I mean, can I ues the prepositions alternatively?</p>
<p>We all agreed to the desicision to go skiing rather than hiking ... is wrong
because it sounds weird....... sounds choppy.</p>