<ol>
<li>In 1972, to reduce pollution in the Great Lakes, (limits having been set by the United States and Canada) on the amount of phosphorus that could be discharged into Lakes Erie and Ontario.</li>
</ol>
<p>(C) limits have been set by the United States and Canada
(D) the United States and Canada have set limits
(E) the United States and Canada set limits</p>
<p>Can you please explain why both C and E are incorrect and why D is correct?</p>
<p>Are you sure D is correct? E sounds like the best answer…</p>
<p>Sorry, it is E. Can you explain why D and C are incorrect?</p>
<p>C doesn’t work because it is saying limits is the main subject, which is incorrect. And D isn’t right because the verb tenses is wrong.</p>
<p>Thanks! Can someone help with this one also:
The survival of many species of marine life may depend on both the enforcement of waste-disposal regulations (and the education of the public) about the fragility of ocean resources.</p>
<p>(A) and the education of the public
(D) along with the education of the public</p>
<p>Why is D incorrect? Seems like they are saying the same thing.</p>
<p>1]C is out because passive forms are wordly
You can rule out E because the original sentence states something in 1972 which is still true—>Present perfect or D: I’m really sure of it, as a matter of fact I’m an international and in school we learn only Standard of writing (speaking impairs this enormously) ;)</p>
<p>2]I think that “both” implies an “and” structure (it might sound horrible 
SORRY)
both → the two reasons are equal in weight to the survival of animals.</p>
<p>D) suggest that “the enforcement of waste-disposal regulations” are enough and minimize the impact of the education.
let’s simplify
A: it’s two recipes and B: only one recipe with a sauce:):) which is illogical due to “both”
BYE and sorry for mistakes</p>
<p>Yes what ^^^ said. The both merits a “both ___ and ___” structure.</p>
<p>075014 writes:</p>
<p>
</p>
<p>This is incorrect. The reasoning “that it is still true” is a matter of logic and not grammar.</p>
<p>In English we write:</p>
<p>Jack hit the ball yesterday. Or: Last week Jack struck out the star hitter.</p>
<p>These sentences describe actions that happened. They are not extended actions – ones which started in the past and are continuing now. Extended actions would require use of the present perfect. And yes it’s true. The ball does stays hit. But the ball was hit only once. We use the past tense for this situation.</p>
<p>The present perfect is used to characterize an action that has started in the past and continues into the present. An example is: Jack has worked on the railroad since January.</p>
<p>C is wrong because it is passive voice. D is right because it puts more emphasize on the fact that canada and US did something, also fogcity is right. the sentence implies that they are still setting limits making it past perfect. “set” means that they did it only once.</p>
<p>The answer is E not D.</p>
<p>The reason it is E is because it says “In 1972”, implying that it happened during that year and maybe not now. If it says “From 1972”, then D would have been the correct answer.</p>
<p>MovingtoTexas is right.</p>
<p>The past perfect (choice D) does not apply. This is something that happened “once” – in 1972.</p>
<p>The answer for your 2nd question is A.</p>
<p>“The survival of many species of marine life may depend on both the enforcement of waste-disposal regulations (and the education of the public) about the fragility of ocean resources.”
(A) and the education of the public
(D) along with the education of the public</p>
<p>You cannot use “along” with “both”. It should be “both A and B” or “A along with B”</p>