某男性胆管结石患者在内镜下 * * 切开后出现腹痛，急诊CT检查提示十二指肠穿孔。实验室检查脂肪酶正常，CT无胰腺炎表现。患者感觉尚可，无发热，肠鸣音正常，腹软，无腹胀；上腹部轻、中度压痛。处理的最好方法是（）

A.收入院，次日上午择期手术

B.收入院，观察、胃肠减压，抗感染治疗

C.收入院观察，病情好转即出院

D.急诊手术

E.再次ERCP跨越穿孔放置支架

用所给词的适当形式填空。

l. If _____ (impossible), I want to buy a robot and let it do housework for me.

2. —Where were you when I called you yesterday morning?

    —I was in the _____ (barber) chair.

3. Yao Ming is _____ (certainly) that he will be in London for the 2012 London Olympic Games.

4. I couldn't fall _____ (sleep) last night because there was too much noise near my house.

5. I _____ (sincere) hope that you can get a good grade in this math test.