汤姆的身体因过度劳累而跨下来.这令他的父母很不安.
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汤姆的身体因过度劳累而跨下来，这令他的父母很不安。
试题答案
Tom broke down because of overwork, which worried his parents a lot.
汤姆的身体因过度劳累而跨下来，这令他的父母很不安。
Tom broke down because of overwork, which worried his parents a lot.