There ______ a number of books on the bookshelf. And the number of the books ____ 50.
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.