Instructions
Read the text and then type the correct form of the word in CAPITALS to complete the gaps.
There is an example at the beginning.

Computers That
Play Games

Computers have had the (0) ability to playABLE
chess for many years now, and their (1) ...PERFORM
in games against the best players in the 
world has shown steady (2) ... . However,IMPROVE
it will be years before the designers of 
computer games machines can beat their 
(3) ... challenge yet - the ancient boardBIG
game called 'Go'. The playing area is (4) ...CONSIDERABLE
larger than in chess and there are far 
more pieces, so that the (5) ... of moves isCOMBINE
almost (6) ... . The game involves planningEND
so many moves ahead that even the (7) ...IMPRESS
calculations of the fastest modern
computers are (8) ... to deal with theSUFFICIENT
problems of the game. 
In a recent (9) ... for computer 'Go'COMPETE
machines, the best machine beat all its 
rivals, but lost (10) ... to three youngHEAVY
schoolchildren, so there is obviously still 
a lot of work to do.