Can you believe his reason for being absent from the class _____ he had to look after his sick mother at home? A.while B.that C when D.as
The bus __________ passengers outside the airport.
—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.