In the reading room, we found her ________ at a desk, with her attention ________ on a book.
----How often do you eat out? ----__________,but usually once a week.
I’m amazed to hear from my school teacher again. _______,it is ten years since we met last.
Peter was so excited ______he received an invitation from his friend to visit Shanghai.
Ladies and gentlemen, please remain _____until the plane has come to a complete stop.
It’s raining heavily outside .We are _______to go out for the picnic as planned.