A．To smoke.B．To wear.C．To cure pain.D．To light a fire.

According to the context, "Their failure" refers toA．those adults who continue to smoke.B．

The only way to cure your toothache is to ext

共用题干Using HIV Virus to Cure CancerScientists

共用题干Using HIV Virus to Cure CancerScientists

共用题干Using HIV Virus to Cure CancerScientists

共用题干Using HIV Virus to Cure CancerScientists