It's very important for us to keep .
You are right.We should learn how to protect ourselves when we're in trouble.( )
A.rapidB.safeC.luckyD.social
This blue pen is .
Look! Some ______ are in the school.
--Are those the ______ books? -- No, they are ______ books.
--______ are they? --They are my ______.
These two are on the chair.