_______are dangerous or challenging sports activities.
举一反三
- They tend to ________ stimulating or intellectually challenging activities.
- Mountain climbing is one of () sports in the world. A: dangerous B: more dangerous C: the most dangerous
- What activities does extreme sports include？
- Different sports activities can _______(丰富) students' life in the campus.
- what is the benefit for american students taking part in different sports activities