I asked this in a Facebook group about 2 weeks ago and nobody's gotten it right yet. I suspect you lot will do much better.
In the above poem, what is the tone of 看?
The correct answer is:
A. 平. There are several ways you can tell. You might recognize this as a heptasyllabic quatrain (七言絕句), where the second and fourth lines (and sometimes the first) rhyme, and the rhyming characters must be a 平 tone. If not, you can see that 寒 and 盤 are both 平 tone, so in order to rhyme, 看 also has to be 平 tone. If you didn't get any of that, then you might know that in Middle Chinese (蘇軾's language), 看 in a 平 tone means "look", while in a 去 tone means "cover eyes with hand" or "try".