Bob is taking the desks away because they ______ too much room.

She was educated at Beijing University, _____ she went on to have her advanced study abroad.

Even in winter the roadsides were places of beauty, ________ countless birds came to feed on the berries and on the seed heads of the dried weeds rising above the snow.

Over the past decades, sea ice _______ in the Arctic as a result of global warming. [ ]

Do you think twenty people are enough for the work—No. I am afraid we need at least______ students.