— They are Mary's bag. She left it on the playground just now, but now she can't find it.
A：looking at
B：looking for
C：looking after
D：looking up
Amy ____ (read) a book when I came in.
look forward to， accuse sb. of sth.， be eager to， inform sb. of sth.， concentrate on， so as to， demand to， depend on， assist sb. with sth. ahead of
有机农业是指在生产中不采用基因工程，不使用化学合成的农药、化肥、生长调节剂等物质，遵循自然规律和生态学原理的农业生产方式，是一种维持土壤、生态系统和人类健康的生产系统。据此回答下列各题。
我国资源的整体分布状况与生产力分布格局不匹配是资源跨区域调配的重要原因。
