Mrs. Black doesn’t know if her American friend_____ to Heilongjiang. If he_____ here, she will meet him at the airport.[ ]

Li Mei is the student _________ handwriting is the best in our class.

A person with good manners never laughs ____people when they are ____ trouble .[ ]

Will the new iphone cost a lot? –I ______ think so. Apple’s products are usually expensive.

_______ of us has some bad habits. We must get rid of them.