单选题 The little boy was so fascinated by the mighty river that he would spend hours sitting on its bank and gazing at the passing boats and rafts.

【正确答案】 A

【答案解析】mighty：强大的，强有力的。We are dealing with forces that are mightier than ourselves．我们正在应付强于我们的势力。strong：强壮的。long：长的。great：大的，伟大的。fast：快的。