1道改写句子,如果可以请写一下原因.

1道改写句子,如果可以请写一下原因.
1.Our school _____ excekkebt meals for students.
A.supplies B.provides C.gives D.offers
2.In some _____,there are small schools for a few farm families in Shanghai.
A.areas B.places C.countries D.zones
3.Oil is the _____ to make plastic.
A.source B.use C.material D.origin
4.Oli and coal come from animals and plants that died _____ years ago.
A.million B.millions C.two millinos of D.millions of
5.Today ,people change sand into yseful things _____ many ways.
A.on B.at C.in D.by
6.We get wood from trees.(from trees加划线,对划线部分提提问）
________ _________ we get wood