Mike wants to be a policeman. He thinks it is a good ______.
The poor little girl was found _____ a cold winter night.
There are ________books on my desk. _______books is fifty.
Don’t waste time any more. Wang Jun __________to be the monitor yesterday.
They are _____little children that you can't look after ____many by yourself at the same time.
______she is only three years old, she knows a lot of English words.