专业、全面、易懂的全领域名词百科

has always puzzled me______ the old man tied a red silk ribbon on the young tree in his courtyard.

题型：单选题

选项

A. that

B. why

C. where

D. what

正确答案：B

名词解析

puzzle使困惑。对应后面的“为何老人将红丝带绑树上”