40. 面临危险/困难 : be confronted/faced with/in the face of danger/difficulty
例句:The reason why we have to grow trees is that they can provide us with fresh air./ The reason why we have to grow trees is that they can supply fresh air for us. 我们必须种树的原因是它们能供应我们新鲜的空气。 九、 So + 形容词 + be + 主词 + that...
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