Every year, the coal workers their lungs X-rayed to ensure their health. A．are havingB．have hadC． ha

题目简介

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

A．are having

B．have had

C． have

D．had had

题型：单选题难度：中档来源：不详

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。