[填空题]The Oscars Awards usually have a ______ system which means to keep the results until the last moment.

[单项选择]
Google’s Gmail system, which serves millions of customers around the world, shut down yesterday. Twitter, the micro-blogging service used by tens of millions of people, went off-line last month. It blamed the trouble on a malicious programmer in Russia who was trying to shut down the account of a user in neighboring Georgia. It is astonishing the local actions of a small number of programmers call bring an entire Internet service to its knees, but that have been the case.
The Internet as it is set up now operates at three levels. The first is the servers that store data and content for use by customers. Google and other large companies keep massive server farms. These are well-protected from outside programmers by sophisticated software, but clearly that does not always work. The protection devices may fail more and more often as hackers get more skillful.
The second part of the Interact is the "pipes" tha
A. To criticize that Google and Twitter provide poor service.
B. To remind people of the danger in using emails.
C. To present a fact that the internet is not stable all the time.
D. To display the hacker’s skills in damaging the internet.

[填空题]In business, many places adopt a credit system,
which dates back to ancient times. At present, purchases
can be made by using credit cards. They fall
into two categories: one has (1)______use, while (1)______
the other is accepted almost everywhere. The
application for the use of the latter one must be made at a
(2)______. (2)______
Once the customer starts using the card, he will
be provided with a monthly statement of (3)______ (3)______
by the credit company. He is required to pay one
quarter to half of his credit (4)______every (4)______
month.
Advantages. 1. With a card, it is not