-Mary,could you tell me if your mother        our school sports meeting tomorrow?

-I think she will come to school if she         free.[ ]

A. will take part in; will be

B. takes part in; is

C. will take part in; is

D. takes part in; will be

下列药物中能用于治疗老年性痴呆的药物是

A．吡拉西坦
B．尼可刹米
C．咖啡因
D．二甲弗林
E．尼莫地平