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精英家教網 > 高中英語 > 題目詳情

Every few years, the coal workers                 their lungs X-rayed to ensure their health.


  1. A.
    are having
  2. B.
    have
  3. C.
    have had
  4. D.
    had had
B
解析:
考查時態。根據Every few years可知句子謂語要用一般現在時態。所以選B。
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James Harrison has an antibody in his plasma that stops babies dying from Rhesus disease, a form of severe anaemia. He has enabled countless mothers to give birth to healthy babies, including his own daughter, Tracey, who had a healthy son thanks to her father's blood.

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