30. Having introduced the advanced scientific methods, the factory turned out ______ in 2006 as a year before.

A. as many as four times machines       B. four times machines as many

C. four times as many machines as       D. four times as many machines

 Having introduced the advanced scientific methods, the factory turned out ______ in 2006 as a year before.

1. A.
   as many as four times machines
2. B.
   four times machines as many
3. C.
   four times as many machines as
4. D.
   four times as many machines