"We can not afford limited progress. We need rapid progress," Ban said at the Third World Climate Conference in Geneva,        by the World Meteorological Organization (WMO).

Jack, who claimed ______ everything clearly, however, he told a lie.

 With a lot of difficult problems ____, the manager felt worried all the time.

The library needs ______, but it will have to wait until Sunday.

The building       now will be used as our reading room.