Question-1 I don't think the point of this question is to understand rhetorical sructure. The the point is 1.idiomatical structure: requirement of , not requirement by 2.D is eliminated because it wrongly uses "was" singular, but it should be "were" pluar. 3.Compared A and E, E is superior to A,because A is wordy and awkward. Question-2 The key to this question is to understand a pretty important point, that is the reference "them' is confusing. It can refer to the currents or the patterns. It's much clearer just to say "the currents of the ocean", that's the end of A. By the by, almost all the sentence correction questions are focusing on grammatic points. There're always be some points to judge or eliminate the options. And usually they are all COMMON SENSE. If you find out it's difficult to decide between two options or there's some structure you rarely see before, then that defintely means there is still one point you can't figure out yet. |