Student or Learner
Leon decided to create a solid chocolate which can ___1___ a long time. After lots of ___2___, the chocolate Dove was finally made and each piece of chocolate was firmly engraved with the letters "DOVE".
1. A. stand B.preserve
The answer given is "preserve", which I think is not natural.
1. Shouldn't it be written as "be preserved" or "last"?
2. The second blank is "research", is it naturally used?
Thanks for your help!
"Preserve" for #1 is nonsense. We simply do not say that something "can preserve" in that way. We say that something "can preserve something else" but that is not the usage here.
I would have used "... which can last a long time."
Another alternative is based on the fact that "to preserve" and "to keep" mean the same thing in some contexts. However, only "keep" works here (and I don't know if it works in AmE).
Leon decided to create a solid chocolate which can keep for a long time. (Note that when we use "keep" we add "for" before the time period involved.)
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.