---Have you found your book yet? ---No. I’m not sure where I ___it.
We've just installed a fan to __________ cooking smells from the kitchen.
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.