求解几道SAT句子改错语法题
答案我已给出,求原因和如何改正
1.No matter how cautious snowmobiles are driven,they are capable of damaging the land over which they travel.
cautious错误
2.Contrasting with most other fifteenth-century rulers,Portuguese kings could count on the support of the aristocracy in any overseas ventures.
Contrasting with错误