选词填空,补全句子。 yours hers ours mine 【小题1】This is your eraser, where is __________ ? 【小题2】Your classroom is clean, __________ is clean, too. 【小题3】------ Is this Sarah’s new bike? ------ No, __________ is yellow. 【小题4】My pencil-box is too small. What about __________ ?