The sign says that children are admitted only if ________ by an adult.

Two hundred yuan.

I used to use English a lot and spent an hour each day _____ English books in the library.

下列句子中没有错别字的一句是（ ）

People come into your life for a reason, a season or a lifetime. When you _______ which one it is, you will know what to do for each person.