в чем отличие в использовании глаголов must и should

1) The paper hangers decided to ......... the picture a few more inches.
a) raise b) rise

2) It was late evening when she finished reading and ......... the papers on the table.
a) laid b) lay

3) In chemistry class we learn that hot air ........
a) rises b) raises

4) Mr Brown .......... and closed his eyes.
a) laid down b) lay down

5) Jim ....... early so that he could play golf before the others.
a) rose b) raised

6) She did a lot of things besides ........ the table.
a) lying b) laying

глаголы)