试题题干
Directions: Read each of the following sentences carefully, and choose A,B,C or D that has the closest meaning to the underlined word or phrase.
Several months later a similar feat was performed by the first American astronaut to walk in space.（）
参考答案
正确答案：
试题解析
noteworthy achievement 值得关注的成就。几个月后，第一位美国宇航员在太空中行走，完成了类似的壮举。