Considering the foggy weather, we can’t _____the possibility of the train coming late again.[ ]

A. predict

B. discount

C. decline

D. reserve

患者，女，28岁，右下颌骨体部迅速肿大2个月，经病理确诊为骨肉瘤，为提高疗效，术前考虑化疗。首选的化疗药物为

A．环磷酰胺

B．顺铂

C．氟尿嘧啶

D．甲氨蝶呤

E．博来霉素