No.19
In addition to having more protein than wheat does, the protein in rice is higher quality than that in wheat, with more of the amino acids essential to the human diet.
(A) the protein in rice is higher quality than that in
(B) rice has protein of higher quality than that in
(C) the protein in rice is higher in quality than it is in
(D) rice protein is higher in quality than it is in
(E) rice has a protein higher in quality than
我知道(C)和(D)錯
因為主詞應該要接rice
but他下面的解釋說這樣的話變成有"rice protein contains wheat" 的意思
是為什麼呢?