--- If I_______ one million dollars, I would give it to medical research.

---If I _______ you, I would give it to charity.

A．will have, am

B．would have, was

C．had, were

D．have, is

肌肉牵拉中的等张收缩可抗阻持续10s，或直接疲劳，然后运动员肌肉放松约（）s，这时运动员的肢体可被动移动到一个最大的限度。