過去時還是現在時?請指教!

linnnn

77. A 1972 agreement between Canadaand the United Statesreduced the amount of phosphates

that municipalities had been allowed todump into the Great Lakes.

(A) reduced the amount of phosphates that municipalitieshad been allowed to dump

(B) reduced the phosphate amount that municipalities hadbeen dumping

(C) reduces the phosphate amount municipalities have beenallowed to dump

(D) reducedthe amount of phosphates that municipalities are allowed to dump (正解)

(E) reduces the amount of phosphates allowed for dumpingby municipalities

雖然agreement是在過去訂下的,但是如果現在仍然有效,那麼都用了"are allowed",爲什麽不能用"reduces"呢?請大家指教!

enkyklios

繁体字

linnnn

自己up一下,希望有人回答啊~

kiwifoodtown

又有人问这个问题了，我觉得还是先翻一下以前的帖子，这个问题应该有很多人回答过了。