It is said that bad living habits as well as dirty surroundings, stuffy rooms and some other factors ________ the wide spread of H1N1.
It ________ that there is no way out of difficulty.
He was afraid there was any wild animal around him, looking round from ________.
Reading without stop is a ______ piece of work.
The clock ________ and we realized it was five o’clock.
Mr. Li is gaining _______. He has to do some exercises to lose _______.