The rich land have changed into desert. 能不能用turn into?

The rich land have changed into desert. 能不能用turn into? 一个英语时态题目Floods and bad farming over the years ruined a land that ______ and made it miserably poor.A.was once rich B.had once been rich C.have once been rich D.was once being rich选哪个,详细讲下为什么 after a long journey at sea.they found the rich[ ]A.land B.floor C.ground D.earth 兰亭 THE LAND IS SO RICH IN BEAUTY怎么样 most of the land in the tropics is not rich .rich means _______ a lot of rich land have changed into desert.forests are becoming deserts.为什么两个desert形式不同.forest前需要the吗 people there have rich land enough water完形填空的一个句子：People there have_(48)rich land _(49) enough water.48:A.both B.no C.not D.neither49:A.either B.and C.but D.nor文意为这里没有肥沃的的土地和充足的水 The rich _____ not always happy.A are B is C have D has,写原因 Does the rich man have ___money?A.much B.many C.lot of D.a lot The art exhibition will _____me rich and famous.A、do B、make C、that D、have The ()(discover) of oil on their land made the family rich I don.t have ---------- to buy the computer .l am only ----- to buy a radioA money enough ,rich enough B enough money ,enough rich C enough money rich enough D money enough enough rich --How is your hometown?--Much richer And the land there is rich enou.--How is your hometown?--Much richer And the land there is rich enough to _______ a large number of sheep.A.support B.live C.feed D.give自我认为是c,但是不确定 ____Switzerland is very small,_____it is the land of watch and it id very rich. People there have (1) rich land (2) enough water1.A.no B.notC.neither2.A.andB.butC.norD.or What do the rich need and the poor have ______ Switzerland is very small,________ it is the land of watch and it is very rich. People in that area are making efforts to turn the desert into rich land请问为什么effort加S