My mother has two brothers, both of ____ graduating from Beijing University．

These diagrams are especially helpful when we have a concrete problem ______ at hand.

________ global temperatures rising, the UN Climate Change Conference was held in Cancun（坎昆）, Mexico last year．

      a little money, Jane was able to buy her mother a lovely new watch.

________ English will help to communicate _____ people from different countries in the world.