sam's parents____dancing and singing in the party

sam's parents____dancing and singing in the party Listen!Sam and lisa are singing in the classroom.否定句 Bobby and Sam and Sam are in the p|aygro Lucy and Lily are s( ) and they look the sam Jack ,Sue and I will__go to Sam's birthday party.a:both B:ne have a party singing and dancing the night away .意思 the nigh we had great fun（）at the party A.sing and dance B.singing an We don’t stop dancing and singing until the party ended. There are ________people dancing and singing in the park on a g________of grils are singing and dancing in the park ---who is singing and dancing in the gym now? nobody but sam and tom (is/are)in the park?