单项选择题

Experts believe that exposure to a deadly ______ that arrived in Australia from Africa decimated frog numbers.
How about the situation of nurses in Caribbean nations

A．Nearly two thousand nurses left the Caribbean between two thousand two and two thousand six.
B．Caribbean nations currently have about one nurse for every one thousand people.
C．Currently, more than twenty-one thousand nurses who trained in the Caribbean are working in the United States, Canada and Britain.
D．All of the above are right.
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单项选择题
Where does economic recovery leave this year’s graduates
A．About one-fourth of graduates who applied for a job have found one.
B．It is still hard for graduates to find a job.
C．All of the above are right.
单项选择题
Which descriptions are right about this news
A．Many people use the Internet to start a genealogical investigation.
B．Internet can help guide people to historical records.
C．The information that people get from Internet is often limited or incorrect.
D．All of the above are right.
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