新prep2-222

222.
                (31727-!-item-!-188;#058&006584)     (GWD-12-Q14)

In 1914 a total of 469,000 cars and trucks were produced in the United States, but in 1929 almost twice the numbers of trucks alone came off the assembly lines.

A. the numbers of trucks alone

B. that number of trucks alone

C. the number of trucks by themselves

D. as many trucks themselves

E. as many trucks by themselves

答案是B，请帮忙看看，为什么，谢谢。

gwd 12-14
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DE只有1个as

A the numbers of trucks 指的就不是数量了

alone放在名词后，有表示“仅仅”的意思   而by oneself不能这样用

number前我觉得也是应该用that 但是说不出来为什么。感觉更符合句子的意思