Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.

Jane_______ this Sunday. Let’s go and say goodbye toher.

5th is the official “Learning from Lei Feng Day” when people are______to learn from Lei Feng, a cultural image symbolizing selflessness and contribution

Could you please sweep the floor I’m going to cook dinner.— _________. I’ll do it at once, Mom.

(2014·福建高三第二次联考)China’s labor supply will continue to rise，despite the fact that the working­age population________