As we know, too much ________ to Xrays can cause skin burns, cancer or other damage to the body.

She is the only one among the ______ writers who _______ stories for children.

Showing ______ to a current or former teacher is a fair reward and an act of gratitude that will also make you feel better.

I’ m sorry. I can’ t give you the telephone number without Mr. Smith’s______.(合肥市)

When delivering a speech, you should adjust your language to the age of your ______ audience.