Onceamanwaswalkingalongabeach.Thesunwasshininganditwasa...
問題詳情:Onceamanwaswalkingalongabeach.Thesunwasshininganditwasabeautifulday.Inthedistancehecouldseeaperson (1) (go)backandforthbetweenthesurf’sedge (2) thebeach.Asthemanapproached,hecouldse...