Doctor Reef lives a ___________ lifeA.happyB.miserableC.easy－goingD.reckless

______has the worlds largest coral reef "the Great Barrier Reef".A．CanadaB．AustraliaC．Irel

The Great Barrier Reef lies off______coast of Australia.A．the southeastB．the southwestC．th

A doctor should be _____ for the lives of the patients.A.suitableB.famousC.responsible

Doctor Reef’s paper balls probably symbolize his ______.A.eagerness to shut himself away f

It is still illegal for a doctor to________.A.hel

—What kind of job _______________?—I want to be a doctor so that I can save lives and