问题
Since advanced technology was introduced early this year, our factory has produced ______ last year.
A:more bicycles than twice;
B:twice as more bicycles as
C:more than twice bicycles as;
D:more than twice as many bicycles as;
B:twice as more bicycles as
C:more than twice bicycles as;
D:more than twice as many bicycles as;
正确答案是：
