The family would then sit in a circle around the inner tube

The family would then sit in a circle around the inner tube 为什么不用sit around a circle,而只能用in? 英语翻译The class sit in a circle with their eyes shut and they In the same circle forever.A,B,Then A again,B again. in the evening,the family sit down to a big goose dinner为什么不 the wizard turned in a circle. Circle the nouns in the sentences.Then write them in the cor circle in the sand Odd one out:Circle the noun in the group .Then cross out the circle the past forms of verbs in the crossword puzzle.then he would like sit in the sun的同义句 the speedboat was moving in a circle.请问一下in a circle怎么解释,为什么