swimming is ___ activity in summer （enjoy）

L think skiing is more dangerous than swimming.L don't think swimming is ___ ___ ___ skiing. There is a boy ___ in the riverA swimming B swim C swims D is swimming Alice is good at swimming.Ben is good at swimming,too.【同义句】 Alice is ___.___ at swimming___Ben. swimming is ___ activity in summer （enjoy） She is swimming（at the pool)对括号句子提问 ___ ___she swimming? My favourite sport is swimming.(同义句) I ___ swimming ______. 同义词转换：Swimming in the river is exciting ___ exciting ___ ___ in the river lt is a good season to go swimming. 同义句转换lt is a good season ___ ____ swimming she is enjoying swimshe is enjoying ___ at the swimming pool.A.swim B.swimming C.swims D.swam (1/2)求答案：He is swimming.He ___ swimming for exercise.A.may be B.must (1/2)求答案：He is swimming.He ___ swimming for exercise.A.may be B.must Sam ___ ___ ___ swimming than me The problen is difficult.I can't work it out.The problen is't easy ____ for ___ ___ woke it out改为同义句Let's go swimming.改为同义句___ ___ ___ swimming? I like swimming.I ___ ___ of swimming. She is good at swimming(改为同义句） She ___ ____　 ____swimming Peter is better than me ___ swimming.A.in B.at请给出正确答案及依据. swimming,hobby,my,is. she is good ( ) swimming.