—Where did you get this book?—I picked it up from a second-hand bookshop if you ______ know.
—Are you going to Mary’s birthday party? — .I might have something else to do.
Air conditioners made in China have won worldwide attentions and GREE has become popular name.
He ________ two tickets for us before he arrived at the entrance of the cinema.
The little baby, if _________ by other people, will wake up and cry.
Don’t call him at this time tomorrow, because he ________ a meeting with his teachers.