Currently offered by some famous universities, MOOCs are attractive to people who do not have the financial resources to meet the growing costs of university education, or who do not have formal qualifications. They also allow participants to study at their own pace.

    The potential for MOOCs to deliver education is obviously vast—they could be considered as a huge step forwards in widening participation. They also have the potential to provide a unique window on universities that offer popular and valuable courses, they may attract some participants to register for formal fee-paying programmes at the same or other universities and are likely to promote new ways of on-line education.

    However, it is still very early days for MOOCs. The quality of the education provision is highly variable, with many courses offering only recordings of lectures, and delivery is particularly difficult in some special fields that require practical classes, research projects or extensive library access. Besides, wider engagement with participants requires very considerable resource. Even limited feedback or examination becomes a major task if there are several thousand students in the class.

Considering the challenges, some people argue MOOCs will soon evaporate (蒸发). But they certainly provide good opportunity for widening higher education, are a means of raising awareness of universities to audiences of tens or hundreds of thousands, and are well worthy of serious consideration.

    Have you seen the cartoons of two penguins(企鹅) on the Internet? They sit on either side of a small1 They are friends, but each does something selfish（自私的）which 2 their friend “ship” to sink(沉没).

    The cartoons have become very 3. It shows how much people value friendship and sometimes 4they may lose their friends. A friend is someone you can share your happy and5 moments with. A friend is someone to talk to about your deepest feelings. And with a good friend you will never be alone.

    However, keeping friendship isn't always 6. The key to7 your friend “ship” from sinking comes down to three simple things: sharing, caring and communicating.  Good friends like to share everything with each other. They share their snacks, they share their8 about schoolwork, sometimes they even share their clothes! And good friends also care about each other. They do9 they can to make their friends happy. But the most important part of friendship is communicating.

    Communicating means talking to your friends and being honest with them. It also means that you keep in touch with your friends even though they may be in10 schools or live far away. Without communication, it is sure to send your friend “ship” to sink into the sea.