5. Please go to the in-patient department to go through the admission procedures.

请去住院部办理住院手续。

还能这样说：

Go through the admission procedures at the in-patient department.

Please go to the Admission Office to go through the admission procedures.

应用解析：

(as) patient as Job 耐心非常大；

patient of 容忍；容许（具有）……意义的

6. You need to stay for one day or two for observation.

你需要住院观察一两天。

还能这样说：

You need to be hospitalized for a day or two for observation.

You ought to be in the hospital for a day or two for observation.

应用解析：

strange to observe 说来奇怪；

the observed of all observers 众所瞩目者；众矢之的；

observe a rule 遵守规则

7. Mr. Smith was seriously ill and now he had already hospitalized.

史密斯先生病重，现已住院。

还能这样说：

Mr. Smith was in the hospital for he became very sick.

Mr. Smith had been treated in hospital for his serious illness.

应用解析：

and now to be serious 现在来谈正经的；

pretending to be serious 煞有介事地；

take for serious 当真

8. I ask for a private ward.

我要求一个单人病房。

还能这样说：

I need to be put in a single ward.

I request to stay in a single sickroom.

应用解析：

in private 秘密地；私下地；

for private reasons 仅仅私下地，不能给外人知道；

for sb.'s private ear 只私下里跟某人讲；

private citizen 平民