Mary often gets to school .
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.
--How clean and tidy your bedroom is! --Thanks. It ______ every day.