问题
Every few years, the coal workers ________ their lungs Xrayed to ensure their health.[ ]
A: are having
B: have
C: have had
D: had had
B: have
C: have had
D: had had
正确答案是：
同类题型
do you have a class meeting—Once a week.
Tommy is planning to buy a car.— I knowBy next month, he ____ enough for a used one
I request that you __________ the task on time.
Mum, can I have to eat I’m hungry.—You can get some in the fridge.
What is your main reason for choosing one restaurant another