Attention, please. The plane has to be _________ because of the foggy weather.— Oh, bad luck! We have to wait now.

eeting ______ over, I found her seated at the desk and ______ to music.

The police refused to _____ the clues they were working on.

Which one do you want to buy, anipod touch 4, an ipad 3 or an iphone 5 —______. They are too expensive.

A report says that many people in Africa have _______ the Ebola virus so far and new medicine _______ it is being developed.