. My uncle will come to Shanghai ______ next  week .He says he will stay here for______.

A．sometimes; sometime

B．sometime ;some time

C．some time ;sometimes

D．some times ;sometimes

卵巢睾丸母细胞瘤来源于（）

A．体腔上皮肿瘤 

B．生殖细胞肿瘤 

C．特异性索间质肿瘤 

D．非特异性索间质肿瘤 

E．胃肠道粘膜肿瘤