which one is better?
1.They will try to cut all of the wood which you see in the pile.Do you think they can do this in one day? 2.1.They will try to cut all of the wood which you see in the pile.Do you think they can do it in one day?

Question

which one is better?
1.They will try to cut all of the wood which you see in the pile.Do you think they can do this in one day?  2.1.They will try to cut all of the wood which you see in the pile.Do you think they can do it in one day?

Answer

RE: "this" vs "it"— either can be used, though "it" is more common, and natural. The structure of the sentence could use a bit of correcting, though. Here's how I would write it:

They will try to cut all the wood you see in the pile. Do you think they can do it in one day?

Answer

WHICH should be changed to THAT, or to be even more natural, don't use either one, as in Elisa's example.

Answer

Hi Henry

Here what I'd say diffrently:

They'll try to cut the wood you see in the pile. Do you think they can do it just in one day?

I hope I helped

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