______on ten years of observation and study, Professor Wang announces that everyone dreams every night, whether they realize it or not.
He sat on the sofa, with his arms ________ and eyes _______ on TV.
______ you make a promise, you should keep it.
Every time ______ they met, they would talk several hours together about the persons and things _______ they remembered in the middle school.
My boss insisted that I _______ the work before ten o’clock tonight.
The country has _______ great changes and become a developed one.