use, using, used, hear, hearing, heard He tried ___ a new microphone and was able to make himself ____
using; heard
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上一篇:Saturday meant that most 1.________ were at home on the route. So were school-age 2.________. I thought this might mean more talk back and forth as I made the 3.________ today. There were many people outdoors, 4.________ in their gardens. Most of the
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