Every few years, the coal workers ___________ their lungs X-rayed to ensure their health. A．are havi...
2023-01-12 17:23:04 193次 上海市招生统一考试英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Every few years, the coal workers
___________ their lungs X-rayed to ensure their health.
|
A．are having
|
B．have
|
C．have had
|
D．had had
|
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