Istillrememberthereu的精選

問題詳情：單項填空 在A、B、C、D四個選項中，選出可以填入空白處的最佳選項。Istillrememberthereusedtobe_______undergroundcave.MyfriendsandIoftenhadfunin_______18-foot-deepcave.A.an;the           ...