The problem is a bit difficult .— ________ask your teacher for help

The math teacher Mr Wang ________ to Beijing for a meeting, and Ms Li is teaching us instead of him.

依次填入下面语段横线处的成语，最恰当的一组是（ ）莫言在中国文坛上虽非________，但其文学才华和艺术创造力令人瞩目。他的小说创作以乡土气息和农民本位为主线，塑造了余占鳌、上官氏、西门闹等率情任性的农民形象。小说《丰乳肥臀》，运用________的艺术概括力，通过上官鲁氏这个母亲的遭遇，把中国人尤其是中国女性所遭受的苦难和母亲的伟大与宽容淋漓尽致地展现出来。纯以文学水平而言，莫言获奖________。

So far, we _______ our home for about half a month _____.

It is well known to us all that a lot of rivers _______by factories