下列各项生命活动属于生物共同特征的是（　　）

《推动共建丝绸之路经济带和21世纪海上丝绸之路的愿景与行动》3月28日发布，“一带一路”促进世界区域合作蓬勃发展．读“一带一路示意图”，完成下列各题．

句型转换
____ She often does her homework at night. (变为否定句)
She                              her homework at night.
____ We are cleaning our classroom now. (对划线部分提问)
                  you          now?
____ He likes pandas because they are very cute. (对划线部分提问)
                he        pandas?
____ I think he is in the classroom.（改为否定句）
I        think he        in the classroom.
____ Mr Black is a doctor.（对划线部分提问）
                Mr Black         ?