单项选择题Hospital doctors don t go out very often as their work ______ all their time.
单项选择题Christmas is a holiday usually celebrated on December 25th ______ the birth of Jesus Christ.
单项选择题A.It s been painting me all night,B.Let s have a look and see what they ve done to you.C.Do I take these Sofradex is they re prescribed here, DoctorD.What s wrong with me, Doctor
单项选择题One must try his best to ______ to the new environment.