swimming (at)还是(in) the swimming pool

swimming (at)还是(in) the swimming pool He studies English very well and 后面跟good at swimming还是is good at swimming she is swimming ____ the pool.填的是at 还是in 在池子里游泳应该用的是in怎么教科书上用at Tim likes swimming and he ( )the swimming team at schoolA.has joined B.has taken part in 这题应该选哪一个,the swimming team算是组织还是活动 at last he s() in swimming across the river at/in/on swimming pool有何区别 and they are very good at swimming in the at the swimming pool和in the swimming pool有何不同 要速度 --------- Mike like swimming at the pool?是is 还是are They are swimming in the river 还是（they are go swimming in the river) go swimming里哪个是动词?是is good at going swiming还是is good at go swimming?急 英语句式怎么选?到底是Are you never good at swimming?还是Do you never good at swimming Where is he swimming?回答At the pool.(1)还能用In the/a pool.(2)Where is he swimming?是他在哪游泳还是他现在在哪游泳的意思? 在游泳池里应该是in the swimming pool还是on the swimming pool some ( )are swimming in the river是fish还是fishes swimming in summer is ()great fun填such还是so swimming is fun in ______weather.填hot 还是warm.为什么 We are enjoying_____ in the pool 填swim还是swimming