23. His interests extended _____ the fine arts to international politics and philosophy.
—Is the dentist at work?—I'm sorry to tell you he is on __________.
—Peter's rarely ill,__________ he?—__________. He is quite healthy.
The Smiths felt __________ about their daughter who had gone to the clinic for three hours.
—I'm leaving for the doctor's this afternoon. —OK, but make sure __________ when you leave.
The patient hasn't got a fever. In other words, his temperature is __________.