The missing boys were last seen _______ near the river.
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.
Havingbeenattackedbyterrorists,________.
A new ______ to teaching languages is being used here, and it has turned out to be very helpful to the students.
The Olympic mascots are the Olympic flame, the panda, the Tibetan antelope and the swallow, _______ a close group of friends.