Pleasant as they made it in Jiuzhaogou, we felt tired after the long journey.
A. to travel
B. travel
C. travelled
D. travelling
网友回答
(答案→)A. to travel
B. travel
C. travelled
D. travelling
解析：本题考查非谓语动词。句中it为形式宾语，真正的宾语为to travel in Jiuzhaogou，故用不定式作形式宾语，选A。