英语：填冠词

英语：填冠词
请说明原因
1．The sun setting in _______ west, I saw birds flying_____ south.
a. /, theb. the, /c. /, /d. a,the
2．He would be there at 12 noon when the sun is ______ on the farm.
a. the warmestb. at warmer c. the warmer d. warmest
第一题原题确实是"太阳从西边升起"，可能题目本身这里有些错了，不过好象不影响答题
另外,第二题
He would be there at 12 noon when the sun is ______ on the farm.
是什么意思?麻烦解释一下,谢了