128.
New hardy varieties of rice show promise of pro-ducing high yields without the
costly requirements of irrigation and application of commercial fertilizer
by earlier high-yielding varieties.
(A) requirements
of irrigation and application of commercial fertilizer by earlier high-yielding
varieties
(B) requirements
by earlier high-yielding varieties of application of commercial fertilizer and
irrigation
(C)
requirements for application of
commercial fertilizer and irrigation of earlier high-yielding varieties
(D) application
of commercial fertilizer and irriga-tion that was required by earlier
high-yielding varieties
(E) irrigation
and application of commercial fertil-izer that were required by earlier
high-yielding varieties
32. GWD17-Q32:
Navigators have known for thousands of years that the ocean has variable currents, but it is only in the last half century that a reasonably clear picture has emerged of the patterns and causes of ocean currents.
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.
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