问题描述：
1.It's time to ____goodbye now.say/saying/said
A.sayB.sayingC.said2.The balloons are _____ away.A.flying B.flyC.fling3.He often _____to school by busA.goingB.goesC.went
A.sayB.sayingC.said2.The balloons are _____ away.A.flying B.flyC.fling3.He often _____to school by busA.goingB.goesC.went
问题解答：
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