We have found no debris（残骸）ofthe missing Malaysian airlines flight in the waters 

Lao Wang ___________ Beijing Opera every morning . Listen, he ___________ in  the garden.

 —The most beautiful teacher Zhanglili ________ a mother to her students.—Yes, she is really a good teacher.

Boys_________ model planes to dolls, while girls _________ have dolls than model planes.

There ______ a book, two pens and three pencils on the desk.