We need to get to the root of the problem______ we can solve it.
From his _______ look, we could see that he hadn’t expected that we could raise such _______ questions to him.
In the face of ______ failure, it is the most important to keep up ______ good state of mind.
The police are ______ to conclude that the cause of fire was a cigarette end.
Last winter, many places of southern China were struck by heavy snowstorms, _____ more than 120 people were killed.
Having been attacked by terrorists, ________.