It has been accepted that all the students ____ put on masks before going to school in case they are infected with flu virus.
So far, several ships have been reported missing the coast of Bermuda Island.
the trees in that thick forest are so dose together that there is hardly any room to move them.
The speech by the mayor of Shanghai before the final voting for Expo 2010 is strongly impressed my memory.
It is raining .
When I went up, saw the baby awake.