—Excuse me, could you please tell me if the sports meeting ________ on time?

—Hard to say. If it ________ tomorrow, we’ll have to put it off.

A．will hold; rains

B．will be held; rains

C．will be held; will rain

D．holds; will rain

关于出凝血的实验室监测中，检查血液凝固机制的实验是（）。

A.血小板计数

B.血块收缩试验

C.全血凝固时间

D.激活全血凝固时间

E.白陶土部分凝血活酶时间