March 11th was one of ______days in Japan,for the big earthquake happened.
Which is ______ to learn, fishing or swimming?
We should keep ______ in the reading –room.
The old woman kept one black dog and two white ______.
Cotton ______ nice and soft.
Shanghai Waihuan Tunnel is already open to traffic, so it will take us ______ time to go to Pudong International Airport.