Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
It’s really dangerous. One more step, ______ the baby will fall into the pool.
Can you believe that in ______ a rich country there should be _______many people.
People never ask for ______second bowl of soup at a dinner party in western countries.
_____ is mentioned above, the number of the students in the senior schools is increasing. A which B As C That D It
How are you going to _______ such problems?