Here____ some of your books.

g was under an “orange” smog alert on Feb. 24, which marks the first time the second-highest warning level of a new system introduced last year________.

While designing a place of recreation, an architect is to consider easy entrances or exits, parkinglot and toilets, etc, his design should take into account the comfort of all citizens.[ ]

Having said farewell to their friends, they _____ for home. [ ]

man body consists of organs, each ____a definite job to do.