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题库 / OG13-SC-71
Along the major rivers that traverse the deserts of northeast Africa, the Middle East, and northwest India, the combination of a reliable supply of water and good growing conditions both encouraged farming traditions that, in places, endure in at least 6,000 years.
good growing conditions both encouraged farming traditions that, in places, endure in
good growing conditions encouraged farming traditions that have, in places, endured for
of good growing conditions have encouraged farming traditions that, in places, endured for
of good growing conditions both encouraged farming traditions that have, in places, endured
of good growing conditions encouraged farming traditions that have, in places, been enduring for
题目分析：
由于语法结构不同，所以在(A)(B)中，具有and关系的两者为water和good growing conditions；在(C)(D)(E)中，具有and关系的两者为a reliable supply of water和good growing conditions。在逻辑上，具有and关系的两者应该保持对等。显然地，“水”和“好的生长条件”在逻辑上是对等的，因此可以排除(C)(D)(E)。此外，(A)中的both没有必要加入，可以排除，答案为(B)。
选项分析：
略
endure：忍耐，如：endure sth/doing sth，忍受某事；持续，如：Sth endure for sometime，某事持续。
本题tradition endure for 6000 years，表示传统持续了6000年，endure已经有持续的意思，不再用have been enduring表示从过去到现在到未来一直进行。
如前述，一个组合当然不可能使用both，排除A
B correct
the combination of a reliable supply of [water] and [good growing conditions] ”水“和“良好的生长环境”✔
the combination of [a reliable supply of water] and of [good growing conditions] ”水的充足供应“和”良好的生长环境“❌
the combination of A and B
Here, the latter of seems to imply that there are two distinct combinations:
the combination OF a reliable supply AND the combination OF good growing conditions
Not the intended meaning.
The required idiom is a combination of X and Y.
Eliminate C and E.
关于both:
both可以做代词/连词/副词，
代词：both of them；I like them both, both做代词同位them
连词：both A and B
副词：We were both tired.
本题，the combination of A and B both do sth,主语是combination这一个东西，没法both
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