some ( )are swimming in the river是fish还是fishes

Some people are swimming in the p... Some of______(we)are good at swimming There ( )some fish in the riverand they are swimming happily some ( )are swimming in the river是fish还是fishes But some people are still not c（ ） in swimming. Some children are playing in the swimming p________..填什么 some of __(me) are good at swimming Some are ______ in the river and some are ______ games.A.swimming… playing B.swimming…plaiing Some are ( )in the river and some are ( )games.A:swiming；playing B:swimming;playing C：swimming；playing some boys ______in the lake.应该填什么,是填are swimming还是 swimming Some are swimming in the river and some are playing games. Some ducks are swimming in the pond对some ducks进行划线部分提问 there are some boys swimming in the poolswimming 前为什么不加 are? What's in the lake?Some boys (swimming)in the lake.请问括号里为什么不是“are swimming? I like swimming.改为一般疑问句.还有He likes swimming.还有There are some books on the teacher's des there ___ little fish swimming in the river.填什么 is ,is some ,are a,are some Some girls (are swimming in the pool) 就括号部分提问._______ ________the girls ________? 适当形式填空Some of ____(we)are good at swimming