If you really have to leave during the meeting, you’d better leave ____ the back door.
With the popularity of network, email has largely ________ the traditional letter.
Many students, ________ some pocket money and social experience, work during their holidays.
He likes books ________ science because he wonders what and why our world is.
You ought to have a good rest ________ you’ve finished your painting.
—Where is the telephone book?—I ________ and get it for you.