The old man very happy in the of his life.
A:fell; rest
B:fell; left
C:feels; rest
Lisa was so_________ that she made many spelling mistakes in her homework.
读一读,猜一猜,背一背。
大脑袋,圆肚子,细尾巴,黑身子,变、变、变……长出四条腿,丢了细尾巴,吃饱了,呱呱呱,捉害虫,顶呱呱。
谜底:____
对豆科植物和根瘤菌的共生关系描述不正确的是( )