Questions 1 to 4 are based on the lecture youve just heard.
1.
What is the speaker mainly discussing?
2. Why do communities build
seawalls?
3. How does a gently sloping beach help prevent erosion?
4. What
would the speaker probably advise engineers to do?
Passage 2
In Britain the biggest number of working foreigners comes from the odd system know as au pair. Every week hundreds of girls arrive from strange capitals to live with English families. They are called au pairs. An au pair girl stays with the family and has free food and lodging. In return she does light work in the house. This system began as a genuine exchange, but now has become a commercial bargain between families who need help and girls who need to learn English. As learning languages has become more important, so the numbers involved have gone up.
The system succeeds fairly well so far as
teaching the girls English is concerned. But it is debatable how far it increases international friendship. There is a basic conflict of objectives―the hosts want cheap labor, the girls want leisure and language. The girls often find it hard to meet English people of their own school ages, for the language schools and clubs are made up of other foreigners.
In spite of its
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