（翻译）此时过马路是很困难的，因此你必须小心。

　　It's hard　_________ _________　the road at the moment,so you must　__________ ___________.

从所给的四个选项中选择最佳答案

—________ do you have to go and see the doctor?

—Once a week．

[    ]

A．How soon　　　B．How long

C．How much　　　D．How often

----How long can I ________ the book?

----Oh, two weeks.

[　　]

________ will he back from Beijing?

[　　]

A．How long

B．How soon

C．How often

D．How far

We all knew he had ________ to say at the meeting yesterday.

[　　]

A．serious something

B．something serious

C．something seriously

D．somethings serious