I left my pen on the desk and now it’s gone; who ________ it?
The letter Mary had looked forward to ____her last night and she was very excited.
The news shocked the whole nation ____a strong earthquake hit Yushu on Apr.14, 2010.
You ____be tired—you have worked only for ten minutes.
—Tom lost his job last week.—___he is wandering in the street these days.
The witnesses(证人) of the accident said that the lorry _______ very fast at the crossroads when the accident happened.