问题补充:
Neil Armstrong is the first man .
A. walk on the moon
B. walk on moon
C. to walk on the moon
D. to walk on moon
答案:
A. walk on the moon
B. walk on moon
(答案→)C. to walk on the moon
D. to walk on moon
解析:
句意:涅尔.阿姆斯特朗是登上月球的第一人。动词不定式短语to walk on the moon作后置定语,修饰 man ,在月球上应是on the moon,故选C。