The girl is Mary Smith, and her last name is ______ .
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.
I _______ you if I find my uncle’s phone number.