CAN YOU HEAR THE LIGHTS? If youve ever (67) .. the Northern Lights dancing in the night sky, youll no doubt have been amazed by their beauty. These strange natural light displays are (68) .. by atmospheric energy, and a recent study has indicated that not only are they pretty to look at, but they may also produce certain distinct sounds. Researchers studying the phenomenon believe they have managed to (69) .. the sounds. The Northern Lights appear most powerfully in Arctic (70) .., where there have been tales told about the noises which (71) .. them for many years. People describe hearing hissing and crackling sounds, like the noises you hear when your radio is (72) .. for a signal. The researchers recorded (73) .. but definite sounds during periods of intense atmospheric activity. They think that what might be creating the sounds are geomagnetic storms, which (74) .. large changes in the atmosphere. On the (75) .., however, the scientific community remains puzzled. 67. A. witnessed B. participated C. appeared D. gazed 68. A. started B. resulted C. sourced D. caused 69. A. capture B. obtain C. bring D. achieve 70. A. neighbourhoods B. grounds C. regions D. districts 71. A. approach B. accompany C. attend D. associate 72. A. finding B. seeking C. trying D. searching 73. A. clear B. faded C. faint D. remote 74. A. generate B. get C. establish D. lead 75. A. all B. whole C. majority D. principal