—Are those books________?—No,they are not mine.They belong to________.
There are about nine_______ students in that middle school.
It’s very nice ______ you to help me with the hard work. ______!
--How was your weekend? ---- _________.
—Why do you like dogs?—________ they are very friendly.
The boy is afraid ______ his mother because she is very strict _____ him.