Seated on the grass ,the girl felt happy的问题

Seated on the grass ,the girl felt happy的问题 the girl s______ on my birthday. i felt very happy. in the grass 与on the grass的区别 walk on the grass的意思 The girl is lying on the grass ,her eyes ____.后面填open还是openi Is the girl happy? (we) is on the grass. the girl is happy的同义句 1.the girl felt b()ill,she needs to go to the hospital at on Sit on the grass.还是 Sit in the grass? in the grass on the grass怎么区分? 草丛里有条蛇是on the grass还是in the grass?