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. ______ understanding the challenges faced by the world’s poorest people can we expect a new future

free of extreme poverty and hunger.

  A. On                                B. Through                          C. Only                                 D. Only by

. ______ understanding the challenges faced by the world’s poorest people can we expect a new future

free of extreme poverty and hunger.

  A. On                       B. Through                   C. Only                        D. Only by

________ understanding the challenges faced by the world's poorest people can we expect a new future free of extreme poverty and hunger.

A．On             B．Through       C．Only      D．Only by

______ understanding the challenges faced by the world’s poorest people can we expect a new future

free of extreme poverty and hunger.

  A. On                       B. Through                   C. Only                        D. Only by

. ______ understanding the challenges faced by the world’s poorest people can we expect a new future
free of extreme poverty and hunger.

 ______ understanding the challenges faced by the world’s poorest people can we expect a new future

free of extreme poverty and hunger.

  A. On             B. Through          C. Only             D. Only by

 Only by understanding the challenges ______ by the world’s poorest people ______ a new future free of extreme poverty and hunger.

   A. faced; we can expect                                     B. faced; can we expect

C. facing; we can expect                                    D. facing; can we expect