you can read the following statements

rabbitbug (兔八哥过Christmas?)
A (deficient) of folic acid (is rarely found) in humans (because) the vitamin is contained (in a) wide variety of foods.

it is one of structural questions in toefl test of 98.2
2002-1-2 -05:00

回到话题: 一个语法:Collagen,a (strong) rubbery protein,(supports the) ear flaps and the tip (of nose) in (humans). 哪个错?

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