—Jane, have you finished your paper?—No, I ________ my sister with her drawing all the morning.

—Can you tell me what time the flight to Detroit leaves?—I’m sorry, but it _______________.

 The last few years ________ many natural disasters around the world, from drought to earthquake.

The fog was so heavy this morning that drivers could hardly _______ the things just ten meters away from them.

The young boy has come to himself in hospital now. But he ___ unconscious for three days.