A sheep_on this kind of grass usually grows much faster than_on ordinary grass.为什么用fed 而不用feeding A fed;oneB feeds;the oneC fed;thatD feeding;it为什么选A我们老师给的答案是A……为什么是fed

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A sheep_____on this kind of grass usually grows much faster than_____on ordinary grass.为什么用fed 而不用feeding A fed;oneB feeds;the oneC fed;thatD feeding;it为什么选A我们老师给的答案是A……为什么是fed
A sheep_____on this kind of grass usually grows much faster than_____on ordinary grass.为什么用fed 而不用feeding
A fed;one
B feeds;the oneC fed;that
D feeding;it为什么选A
我们老师给的答案是A……为什么是fed

A sheep_____on this kind of grass usually grows much faster than_____on ordinary grass.为什么用fed 而不用feeding A fed;oneB feeds;the oneC fed;thatD feeding;it为什么选A我们老师给的答案是A……为什么是fed
第一个空填fed. 因为羊是被喂的,多以用feed的过去分词.
第二个空填one.因为one是指代羊,sheep是可数名词,所以用one指代.而that是指代之前出现的不可数名词,例如：1.The information on the Internet gets around much more rapidly than__c__in the newspaper.
A.it B.one C.that D.those

第一个空，羊是被喂养，被动的，所以用过去分词fed 排除了BD
第二个空，用one代替前面出现过的羊，羊虽然是单复数同形，但是是可数名词，所以不能用that来代，就用one来代所以排除了C

sheep是被喂养，所以用feed的过去分词表被动，修饰sheep

第一个空应该是feeding
feed on 以。。为主食
feeding on this kind of grass 是现在分词短语作定语，（以这种草为主食的）
第二个空one 表示某一个、任何一个，不定指,。因为前面出现了a sheep是不定指的一只羊
又如 A bridge made of stone is stronger than one made of...

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A sheep_____on this kind of grass usually grows much faster than_____on ordinary grass.为什么用fed 而不用feeding A fed;oneB feeds;the oneC fed;thatD feeding;it为什么选A我们老师给的答案是A……为什么是fed This is a love this is a japan This is a this is a This is a book this is a Demo This is a secret what a( )this pencil? If this was a This is a story This is a This is a n_____jacket is this a jacket This is a cirde. This is a this is a hat This is a snowmans