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 -----I heard that many westerners prefer vegetables to meat．

       -----It is true．Americans eat ___ vegetables each person today as they did 20 years ago．

       A．more than twice                               B．as twice as many                      

       C．twice as many                                  D．that twice as many

.-----I heard that many westerners prefer vegetables to meat.
-----It is true. Americans eat ___ vegetables each person today as they did 20 years ago.

.-----I heard that many westerners prefer vegetables to meat.

-----It is true. Americans eat ___ vegetables each person today as they did 20 years ago.

—I heard that many westerners prefer vegetables to meat.

—It is true. Americans eat ________ vegetables each person today as they did 20 years ago.

A．more than twice                                      B．as twice as many

C．twice as many                                         D．that twice as many