After 5 days of fantastic space trip the two astronauts walked out of the spaceship .A.

问题补充：

After 5 days of fantastic space trip ,the two astronauts walked out of the spaceship, .

A. tired and happy

B. tired but happy

C. tiredly and happily

D. tiredly but happily

答案：

A. tired and happy

(答案→)B. tired but happy

C. tiredly and happily

D. tiredly but happily

解析：句意：五天的奇妙太空旅行后，这两个宇航员走出了宇宙飞船，感到又累又高兴。这里用形容词作状语表示主语当时的情况，用副词是修饰动词，这里用形容词来修饰主语的情况，故选B。