She is a hardworking student, and all her spare time she has ________ staying in the library.
He'd __________ a volleyball court on the beach with a stick.
—Are all the titles of the articles __________ in the contents? —Yes, all __________.
Great attention must be paid __________ welfare, especially in the poor area.
—Why were you so late for work today? — __________ to the office was very slow this morning because of the traffic.
No one can avoid __________ by advertisements.