问题
选择题
Every year, the coal workers their lungs X-rayed to ensure their health.
A．are having
B．have had
C． have
D．had had
答案
答案：C
考查时态题。根据时间状语every few years,可判断本句应为一般现在时，have lungs X-rayed意思是“请人检查肺”。因此答案选C。
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