There are usually 28        in a person’s mouth, so we should listen to the doctor’s ______ to protect（保护）them.

My sister and I ________ in No.7 Middle School.,

--David has been away for more than 25 days． --I miss him very much．You know，25 days      short．            

There ______ a computer and two boxes on my desk. 

______ sunshine and rainfall ______ a good harvest of fruits and begetables this year.