I called you at 4:50 yesterday afternoon, but no oneanswered.—Sorry. I_______with my friends at that time.

You could have walked here.—Yes. A taxi___________ necessary.

Must I go there right now?—No，you ________.You ________ go there before supper.

The rich only ____ themselves in making money and had no eye for the needs and welfare of their workers. [ ]

ou tell me what time the flight to Detroitleaves—I’m sorry, but it _______________