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cleans are cleaning is cleaned are cleaned
is composed of is made of contain is composed of
No problem Don't bother Never mind It doesn't matter
three fourths; has three fourths; have three fourth; has three fourth; have
lots of rooms for shoppers to sit in. lots of rest rooms for shoppers to use. ample space for shoppers to move round. lots of rooms where new varieties of goods are on display.
the largest of them the largest of what the largest of which the largest of that
Three-fifth; has Three-fifth; has been Three-fifths; has Three-fifths; have
Conference rooms may not be used for more than three hours A meeting in the conference room has been canceled Employees must reserve conference rooms in advance Only department managers may use the conference rooms
is comprised of is made of contain is composed of
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