Choose the letter A, B, C or D to complete the passage belowEx4: Choose the letter A, B, C or D to complete the passage below A tsunami is a chain of fast moving waves in the ocean caused by powerful earthquakes or volcanic eruptions. Tsunami has a very long wave . It can be hundreds of kilometers 6)......................Usually , tsunami starts suddenly . The waves travel 7).........................a great speed across an ocean with little energy loss . They can remove sand from beaches , destroy trees , toss and drag vehicles , damage houses and even destroy whole towns. The water will draw back from the coast half of the wave period prior to the wave getting to the coast . If the slope of the coast is not deep , the water may 8 ).....................for hundreds of meters . People who do not know of the danger will often remain at the shore . Tsuami cannot 9)...............................However , there are ways to help stop people from dying from a tsunami . Some 10) .....................with lots of tsunamis may use warning systems which may warn the population before the big waves reach the land . Because an earthquake that caused the tsunami can be felt before the wave gets to the shore , people can be warned to go somewhere safe . Question 6: A. deep B. long C. high D. thick Question 7: A. of B. in C. on D. at Question 8: A. raising B. arise C. raise D. rise Question 9: A. to prevent B. prevent C. be prevented D. preventing Question 10: A. waves B. traps C. areas D. slopes |