Do you think we should share our problems with our parents?
Sure! ______ we talk to them,we will feel worse.( )
A.If.B.Although.C.Because.D.Unless
—How many _______do you have?
Here are many_______ and________.
This blue pen is .
Look! Some ______ are in the school.
--Are those the ______ books? -- No, they are ______ books.