核心问题
（1）... but I can't spend much time on it.
(2) Though I like writing to my penfriend, it takes a lot of time.
在以上两句里, spend 和 take 都表示“花费(时间)”解, 它们有区别吗?
词典解答
spend 总以表人的词语为主语：
- Teabing has spent much of his life studying the Holy Grail. (Dan Brown, The Da Vinci Code) 提彬一生花费了大量时间研究圣杯。(《达·芬奇密码》)