In 1970, 230,000 cars and trucks are made by American manufactures, but in 1981 _______ come out od assembly lines.
A. twice the number of trucks alone
B. twice the number of trucks by themselves
C. twice as many trucks alone
D. twice as many trucks themselves
E. twice as many trucks by themselves
沒有答案, 不知道大家覺得如何, 我比較 prefer A... :P