—_______ do you talk to your teacher at the School Air?—Once a week.
In the cave they found the very book, the cover of _______was torn.
-Excuse me.How long can I keep the book?-You can return it by the end of this month.
Children are having a good time in the park.
I like the MP3, it’s too expensive.A. but B. so C. and
The boy found _____ easy to fly kites.A. that B. it C. this