If you ______ your promise,the results will be sure to satisfy you.

The Mid-autumn Day happening to _________along National Day, it is estimated that it will be 38 years ________ we can experience such a coincidence again.

---Try to remember to turn off the light when you leave the room. ---I’m trying to    expenses.

Mr. Zhang is the best music teacher in our school, but he has hurt his left foot and cannot ________tomorrow's concert.

He works very hard in order to get himself ______ into a key university.