You'll get wet if you fall into a river.
如果掉到河里你会弄湿的。
If you mom and I fall into a river and you can only save one, who will you save?
如果你的母亲和我同时掉进河里，而且你只能救一个，你会救谁？
We saw a boy fall into the river while going through the bridge.
当我们过桥的时候，我们看见一个男孩儿掉进河里。
When we were walking across the bridge we saw a boy fall into the river.
当我们过桥的时候，我们看见一个男孩儿掉进河里。
When we were walking across the bridge we saw a boy fall into the river.
当我们过桥的时候，我们看见一个男孩儿掉进河里。
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