If the sun were to __________（消失），what would the earth be like?
You can buy many ______(纪念品) in every place of interest.
When spring comes, ______(各种各样的) flowers will blossom.
Every child should take part in ______(运动的) sports to build up their body.
My daughter has many ______(怪念头) in her little head.
After many ______(实验), he finally succeeded in finding the solution to the difficult problem.