OG148

[CUGGYER]

148. Under the Safe Drinking Water Act, the Environ­mental Protection Agency is required either to approve individual state plans for controlling the discharge of wastes into underground water or that they enforce their own plan for states without adequate regulations.
(A) that they enforce their
(B) for enforcing their
(C) they should enforce their
(D) it should enforce its
(E) to enforce its

答案是E (明顯 )

choices A, B, and C use plural pronouns (they and their) that have no grammatical referents.

但我對代名詞有問題 請問its 是代什麼阿???
還有他會什麼說沒有referent呢?

[eggcake520]

its 指EPA這個機構吧...
A,B,C沒有referent是因為邏輯句意來看代名詞指的是EPA，所以複數不行。