摘要：To climb the mountain road was hard work but to go down the hills was great fun.
网址：http://m.1010jiajiao.com/timu3_id_2929691[举报]
________ the mountain road was hard work ________ to go down the hills was great fun．
- A.To climb, and
- B.Climbing, and
- C.To climb, but
- D.Climb, but
________ the mountain road was hard work ________ to go down the hills was great fun．
[ ]
A．To climb, and
B．Climbing, and
C．To climb, but
D．Climb, but