下列哪项不属于前置胎盘的期待疗法（）

A.卧床休息

B.静脉缓滴硫酸镁

C.宫颈环扎术

D.定期检查凝血机制

E.地塞米松促胎肺成熟

Why don't you bring ______ to his attention that you're too ill to go on working?[ ]

A. one

B. it

C. this

D. that