up to 的用法GM foods are especially popular in the U.S,where ___ two thirds of the food products in supermarkets could contain GM crops.A.as high as B.up toC.so much as D.as far as为什么?以及不选其他选项的理由?

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upto的用法GMfoodsareespeciallypopularintheU.S,where___twothirdsofthefoodproductsinsupermarketscouldcont

up to 的用法GM foods are especially popular in the U.S,where ___ two thirds of the food products in supermarkets could contain GM crops.A.as high as B.up toC.so much as D.as far as为什么?以及不选其他选项的理由?
up to 的用法
GM foods are especially popular in the U.S,where ___ two thirds of the food products in supermarkets could contain GM crops.
A.as high as B.up to
C.so much as D.as far as
为什么?以及不选其他选项的理由?

up to 的用法GM foods are especially popular in the U.S,where ___ two thirds of the food products in supermarkets could contain GM crops.A.as high as B.up toC.so much as D.as far as为什么?以及不选其他选项的理由?
up to 是高达多少, 这里是高达三分之二的食物
而as-----as 是比较级, 这里没有比较,只是说了美国的转基因食品数量

定语从句，ABC都是连词，不可用

up to 的用法GM foods are especially popular in the U.S,where ___ two thirds of the food products in supermarkets could contain GM crops.A.as high as B.up toC.so much as D.as far as为什么?以及不选其他选项的理由? Up to now的用法 这里的have been的用法?despite the fact that GM foods have only been around a little over 12 years. 如果这里和被动没关系 这只是be的过去分词.那么这个是什么形式的到底? wanted to walk up 的用法 add up to用法 food 和foods 的区别,怎么个用法 Your opinion on producing GM foods中文意思 英语中to,up,on,in,into 的用法 till（up to ）now 的用法及造句是? refer to与look up的区别和用法 例句 hoop up to的具体用法与解释 nutrition foods 和 nutrient foods 哪个用法是对的?上面两个不知道哪种是正确用法,还是两个都对,用法不同?麻烦解答的详细点. be up to的详细用法知道的把be up to 的所有用法都说一下, 有关add up和add to,add up to的用法 Whatever I add up to,I'm not her.请解释add up to 的用法~ put up 的用法 give up 的用法? give up的用法?