XY09-14 alone和by themselves?

xboytime

答案是B，我选的是C，不知道问题处在什么地方。。。

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 tucks alone came off the assembly lines.

 

1. the numbers of tucks alone

2. that number of trucks alone

3. the number of trucks by themselves

4. as many trucks themselves

5. as many trucks by themselves

Again

只有alone修饰动词时,才能够和by oneself互换,这里alone修饰名词。

xboytime

有道理，谢谢指点！