请选择ABCD0\9J2\1p*f.c After the new technique was introduced, the factory produced______ tractors in 1988 as the year before.3K4M.K,T.w1f(T;c:l)P
A. as twice many3K4M.K,T.w1f(T;c:l)P
B. as many twice3K4M.K,T.w1f(T;c:l)P
C. twice as many3K4M.K,T.w1f(T;c:l)P
D. twice many as3K4M.K,T.w1f(T;c:l)P