om fell off his bike,and his

同学你好！解析：

Tom从他的自行车上掉下来，手伤得很重．

【解答】quietly安静地；carefully细心地；slowly慢地；badly糟糕地；根据Tom fell off his bike可知手伤得很严重，本题的正确选项为D。

同学你好！如果对本题仍有疑义请追问，我将继续为你解答。祝你学习进步！