求助初中英语选择题-4One day drought may be a thing of the past at lea

求助初中英语选择题-4
One day drought may be a thing of the past at least in coastal cities. Vast areas of desert throughout the world may for the first time come to life and provide millions of hectares of land where now nothing grows. By the end of this century this may not be mere _________.
speculation imagination computation expectation
这题为什么不选expectations而选speculation呢?
Many icebuergs are, of course, far too small to be towed any distance, and would melt before they reached a country that needed them anywhere. It would be necessary to locate one that was _________ and that was big enough to provide a good supply of ice when it reached us.
manageable manipulative operable captured
为什么选manageable而不是operable呢?明显是操作更合题意啊……
But the 19th-century French novelist Jules Verne may be called a futurologist in the fullest _______ of the word.
sense meaning detail implication
为什么选sense?
These novels still have a great attraction _________ young readers of today because of their bold imagination and scientific accuracy.
for of on towards
这题是选of吗?
New synthetic foods will form a _________ part of people’s diets.
usual popular daily regular
为什么选regular而不是daily?
因为这是90年之前的大学题目，所以我想现在也许属于初中水平，因为现在的小孩很厉害，我没有任何想要欺骗任何人的意思。本来就是想提个问，没想到居然是这样的结果，算是我的错吧……