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题库 / Prep2008E1-SC-181
The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.
doubling the increase of
doubling that of the increase in
double as much as the increase of
twice as many as the increase in
twice as many as the increase of
题目分析：
本题涉及到了较多比较的用法。注意本题的含义，这里的double是make twice as great（造成两倍的）的意思，也就是“使increase/growth两倍”，所以本题直译过来是“今年的人数造成了去年增长人数两倍的增长”。因此，严格来讲，并不是“比较”the number of people和“去年的增长”，而是the number of people发出了“造成两倍”这个动作。
选项分析：
A选项：Correct. 本选项在语法和逻辑上均是正确的。
B选项：代词that of无指代对象。在逻辑上，that不能指代the number，the increase in previous year已经表达了去年的增长数字，再用number就赘余了。
C选项：double as much as the increase of需改为double the increase of。这是因为，当“非数字物体（即，这个名词本身没有纯粹的数字概念，例如dogs、cats等绝大多数名词）”比较时，我们通常会用double(twice) as much as或double(twice) as many as，例如：
twice as many dogs
double as much water
但是，当“数字”比较时，我们不能加as many或as much，例如：
twice the increase
double the decrease
显然地，增长和下降本身就是数字的概念。因此，不能用double as much as the increase of。
D选项：本选项错误同(C)。另外，由于the number是不可数名词，所以至少应该改为much。
E选项：本选项错误同(D)。
RON:if you say "twice as many", then this construction should be paired with a countable noun./
e.g., twice as many dogs --> "dogs" is a countable noun/
if you said "twice as much", then this construction should be paired with an uncountable noun./
e.g., twice as much water --> "water" is an uncountable noun/
if the noun in question is already an explicitly numerical quantity, then you should use neither "much" nor "many". instead, you should just use "twice" or "double" by itself./
e.g., twice the increase --> "increase" is an explicitly numerical quantity/
these rules are followed pretty closely./
so, for instance:/
twice as much water --> correct, since "water" is an uncountable noun (but is not an explicitly numerical quantity)/
twice the water... --> incorrect, since water is not a numerical quantity/
twice as much as the increase... --> incorrect; redundant/
twice the increase... --> correct/
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