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

下述哪种睾丸肿瘤属于非生殖细胞肿瘤（）

A.胚胎癌

B.绒毛膜上皮癌

C.恶性畸胎瘤

D.精原细胞肿瘤

E.间质细胞肿瘤