请问下列句子哪个是正确的：1.I have used 20 percent of the pen’s ink last night in this letter.2.I have used 20 percent of the pen’s ink last night in writting this letter.3.I have used 20 percent of the pen’s ink last night with this letter.
參考答案:use sth. to do sth. 用某物做某事
use sth. for doing sth. 用某物做某事
use sth in doing sth ??不要乱创造！
只能选A。
因为C with没有这样用的！在这句里就算翻译成以(手段、材料),用(工具) 也不通~
