A. pleased

　　B. worried

　　C. surprised

　　D. disappointed

　　参考答案21-24 BADC

　　B

　　WASHINGTON—Laura Straub is a very worried woman. Her job is to find families for foreign teenagers who expect to live with American families in the summer.

　　It is not easy, even desperate.

　　“We have many children left to place—40 out of 75,” said Straub, who works for a foreign exchange programme called LEC.

　　When foreign exchange programmes started 50 years ago, more families were accommodating. For one thing, more mothers stayed at home. But now, increasing numbers of women work outside the home. Exchange-student programmes have struggled in recent years to sign up host families for the 30, 000 teenagers who come from abroad every year to spend an academic year in the United States, as well as the thousands more who take part in summer programmes.

　　School systems in many parts of the U.S., unhappy about accepting non-taxpaying students, have also strictly limited the number of exchange students they accept. At the same time, the idea of hosting foreign students is becoming less exotic(有异国情调的).

　　In search for host families, who usually receive no pay, exchange programmes are increasingly broadening their requests to include everyone from young couples to the retired.

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