.Some of his suggestions had been rejected _________ they were quite impracticable

Where did you find the professor who made the speech yesterday?— It was in the hall ____ the students often have a meeting.

How time flies! It’s almost three years ____ we met last time.

you come to my birthday party tonight — I’d love to, but I______ on a patient at 6o’clock

She has _____she remembers all the names of the students she has taught.