3.As long as you return the money promptly.I'll lend it to you with (please) (pleasure ).
5.We should try to learn more (economy) (economic ) theory and apply it in practice.
6.Exercise,fresh air,and sleep are (essence) (essential ) for the preservation of health.
8.The English teacher smiles at me.She must feel (satisfy) (satisfied ) with what I have done.
9.He (cover) (discovered ) someone sitting by the window,reading a book
10.Mr.Smith wondered how the little child could (memory) ( memorize) all she was taught.
11.A passport is a document (issue) (issued ) by a country to its citizens that permits them to leave and re-enter the country.
12.All these worries made it (possible) (impossible ) for her to concentrate on her work.