阅读下面短文，从A、B、C、D四个选项中选出最佳选项。
The internet will open up new vistas (前景), create the global village--you can make new friends all around the world.That, at least, is what it promised us. The difficulty is that it did not take the human mind into account. The reality is that we cannot keep relationships with more than a limited number of people. No matter how hard the internet tries to put you in communication, its best efforts will be defeated by your mind.
The problem is twofold(双重的). First, there is a limit on the number of people we can hold in mind and have a meaningful relationship with. That number is about 150 and is set by the size of our brain. Second, the quality of your relationships depends on the amount of time you invest(投入)in them. We invest a lot in a small number of people and then distribute what's left among as many others as we can. The problem is that if we invest little time in a person, our engagement with that person will decline until eventually it dies into "someone I once knew".
This is not, of course, to say that the internet doesn't serve a socially valuable function. Of course it does. But the question is not that it allows you to increase the size of your social circle to include the rest of the world, but that you can keep your relationships with your existing friends going even though you have to move to the other side of the world.
In one sense, that's a good thing. But it also has a disadvantage. If you continue to invest in your old friends even though you can no longer see them, then certainly you aren't using your time to make new friends where you now live. And I suspect that probably isn't the best use of your time. Meaningful relationships are about being able to communicate with each other, face to face. The internet will slow down the rate with which relationships end, but it won't stop that happening eventually.
54. What is stressed(强调) in the first paragraph?
A. The present situation of the internet.
B. The difficulty in communication on the internet.
C. The socially valuable function of the internet.
D. The role of the human mind in the internet communication.
55. The underlined word "engagement" in the second paragraph probably means .
A. appointment B. connection C. interview D. agreement
56. According to the passage, the author holds the view that .
A. the internet fails to play so valuable a role in communication as it promised
B. the internet decides the quality of social relationships
C. the internet greatly increases the size of social circles
D. the internet communication is no less effective than the face-to face talk
57. What is the author's attitude towards the use of the internet to strengthen relationships?
A. He is uncertain about it. B. He is hopeful of it.
C. He is in favor of it. D. He doubts it.
知识点：日常生活类阅读
DBAD