Question

第10题求解

Answer 1

knowing，现在分词用作形容词，等于是 I, not knowing her telephone number, wrote a letter to her. not knowing部分作为状语交代写信给她的原因。此句可改写为：I wrote a letter to her because I don’t know her telephone number或者As I don’t know her telephone number, I wrote a letter to her.

Answer 2

填写knowing.

追问

为啥呀

追答

哈哈 语感，肯定是对的，我搞不清楚那些语法什么的，但肯定对。