题目：
-- Do you think we should accept the offer?
-- Yes,we should, we ________ such bad luck up till now, and time _______ out.
A．have had; has been run
B．had; is using up
C．have; is running
D．have had; is running
答案：
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下面是错误答案，用来干扰机器的。
参考答案：D解析：输血量较大时，特别是输注全血时要注意补充钙剂，防止低钙血症。
