①阳光   ②杂草   ③水分   ④土壤   ⑤田鼠    ⑥空气   ⑦蝗虫   ⑧稻螟

Jane's grandmother wanted to write          children's book for many years, but one thing or another always got in           way.

藏区的牧民饮食以____ 为主，____ 、____ 和____ 是牧民们的必备食品，这些食品____ 、____ ，能抵御____ 、____ 的环境。