_______________will not continue if an ongoing operation is changed or deletedA、

29．__________ when you are on the bus or bike．

Which do you think is _________________important, health or wealth?

And they can ______their passports______，making leaving or “escaping” virtually impossible.

Either he or I ______to the airport.

WWW的描述语言是______。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

访问WWW网时，使用的应用层协议为_______。

访问WWW网时，使用的应用层协议为______。

WWW客户机与WWW服务器之间的应用层传输协议是______。

Hurry up, or you ______ catch the train.

关于WWW服务系统的描述中，错误的是______。