—Hi, Tracy, you look tired.—I am tired. I__________ the living room all day.
The Spring Festival falls ________ the first day of the Chinese Lunar year.
Do you still remember the chicken farm _____ we visited the other day?
It is diving _____ great speed that often causes serious accidents.
______ is necessary for everyone to obey the traffic rules.
___ H1N1 flu from spreading, our government has taken some effective measures.