There was a _______ look on her face when she met with the _______ problem.
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.
._____ nothing is doing ill.