John, who is seventeen this year, usually eats ____ his father does. No wonder he is growing taller. [ ]

A. twice more than as much as

B. more than twice as much as

C. twice as much as more than

D. twice as more than much as

重型口疮的损害特点是（）

A.多个溃疡、大而深

B.溃疡为圆形或椭圆形、散在分布

C.单个溃疡、大而浅

D.除口腔溃疡外，常伴有生殖器损害

E.单个溃疡、基底硬结