The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film.
The movie was ___wonderful ___I wanted to see it again.
If you can’t work out the math problem, you can ask your teacher ___some____.
The work is ___difficult for the boy to do. Please give him some help.
—How do you study English? —I study by ___ more.
–Do you know __________tomorrow? --At 8 o’clock.