Thank you _____ your telephone number. Can I call you _____ the number?
–__________ is your school trip? –It’s OK.
It takes us an hour ___________ to school on foot every day.
The girl ________ blue eyes (眼睛) is Helen’s sister.
_________ is exciting to join the dance club on the weekend.
Mrs. Wang teaches _________ music. We like ______ classes very much.