E1 Nino is the name given to the mysterious and often unpredictable change in the climate of the world. This strange 1happens every five to eight years. It starts in the Pacific ocean and is thought to be caused by a failure in the trade winds(信风),which affects the ocean currents driven by these winds. As the wade winds lessen in 2,the ocean temperatures rise,causing the Peru current flowing in from the east to warm up by as much as 5℃.
　　The warming of the ocean has far-reaching effects. The hot,humid(潮湿的)air over the ocean causes severe 3thunderstorms. The rainfall is increased across South America, 4floods to Peru. In the West Pacific,there are droughts affecting　Australia and Indonesia. So while some parts of the world prepare for heavy rains、and　floods,other parts face drought,poor crops and 5.
　　E1 Nino usually lasts for about 18 months. The 1982-83 E1 Nino brought the most 6weather in modem history. Its effect was worldwide and it left more than2,000 people dead and caused over eight billion pounds 7of damage. The 1990 E1 Nino lasted until June 1995. Scientists 8this to be the longest El Nino for 2, 000 years.
　　Nowadays, weather experts are able to forecast when an E1 Nino will 9,but they are still not 10sure what leads to it or what affects how strong it will be.
A. estimate
B. strength
C. delibrately
D. notify
E. tropical
F.phenomenon
G.stable
H.attraction
I. completely
J. destructive
K. bringing
L. starvation
M. exhasution
N. worth
O. strike