I hate it when she calls me at work—I'm always too busy to _____ a conversation with her.
He is taking ______ now.
一簇（A. cù B. chù）____
缝隙（A. xī B. xì）____
颤动（A. chàn B. chān）____
△ABC中，∠C=90°，BC=6，AC=8，顺次连接△ABC各边中点，得到的三角形面积是____
