The biggest problem for most plants, which ___ just get up and run away when threatened, is that animals like to eat them.
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.
I saw Tom ______ into the classroom without ______.