https://online2.tingclass.net/lesson/shi0529/0009/9215/f/2.mp3
https://image.tingclass.net/statics/js/2012
F-2:fall back on别无选择
A:That's awfully bad. There is no water.
A:太糟了,停水了。
B:We have some bottles of mineral water to fall back on.
B:咱们还有几瓶矿泉水,必要时可以使用。
A:Thank you for your consideration.
A:多亏你细心。