These days people in China _____ take too much money when shopping because they often use Alipay or WeChat Pay.( )
needn't
mustn't
shouldn't
can't
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.