【B7】
A. engaged
B. employed
C. obsessed
D. embarking
It can be inferred from the 2＜上标＞nd paragraph that ______.
A. the whole Asia was influenced by the bird flu
B. the bird flu virus won't transmit among human even if it mutate
C. H5N1 virus will no longer in existence after two years
D. the virus transmission among poultry can be controlled in about two years
Which of the following is TRUE according to the passage？
A. The farm in Tianjin was first to announce a suspected outbreak.
B. The bird flu virus has spread over most provinces of China.
C. Up till now, nobody in China is infected by the virus.
D. The virus found in China comes from Vietnam.
Which of the following is the best title for the passage？
A. Polarity Reversal: A Fantastic Phenomenon of Nature.
B. Measurement of the Earth's Magnetic-Field Intensity.
C. Formation of the Two Poles of the Earth.
D. A New Approach to the Study of Geophysics.
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