____ we rode our bikes for one and a half hours, we ____ the bookstore.
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.
______ India and China are of ______ same continent.