OG 62,help!

mzhxt · 发表于 2007-5-2 13:03:00

A 1672 agreement between Canada and United States reduces the amount of phosphates that municipalities had been allowed to dump into the Great Lakes.

A: reduces the amount of phosphates that municipalities had been allowed to dump

D:reduces the amount of phosphates that municipalities are allowed to dump

帮我看看选哪个？谢谢！

Jolin_hz · 发表于 2007-5-2 15:37:00

none is right, reduced&are allowed to

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