11.   Its striking appearance and unusual habits, however, made it a prize worth concentrating every effort upon.

12.   There is still evidence that the young and newly diagnosed patients remain at increased risk of death and it is among these that we must concentrate our efforts.

13.   At New Year television and newspapers are concentrating efforts on identifying the most important, or even the looniest events of the past year.

14.   And they are still wrestling with where to concentrate their efforts.

15.   Banks have concentrated efforts on absolute requirements, like interbank payments.

16.   Baker has concentrated his efforts on the gas business and gas companies, says Nan Musso, skills development coordinator at Chevron in Houston.

17.   Because the wages were insufficient, he was forced to concentrate his efforts on his day job.

18.   Both U.S. and Canadian conservationists have concentrated pro-park efforts in the United States.

19.   A massive U.S. Navy search concentrated its efforts around Howland Island.