1. What's up with him today? He has a face like thunder!
他今天怎么了？他看着怒气冲冲的。

2. I'm a bit disappointed in John and David. It turned out they were only fair-weather friends.
我对约翰和大卫有点失望，原来他们不过是靠不住的酒肉朋友。
fair-weather: 限于好天气的；只能同安乐不可共患难的

3. We don't have a snowball's chance of winning that contract!
我们根本就没有一点希望能签那份合同。

4. Don't worry about those two arguing. it's just a storm in a teacup.
不用为他俩的争执担心，他们不过是小题大做罢了。
a storm in a teacup: 小题大做
5. The exam was a breeze.
这次考试真是太容易了。

6. We're snowed under at work.
我们工作忙得不可开交。

7. They're blowing hot and cold over this issue. It's impossible to know what they want!
他们在这件事情上摇摆不定，根本不可能知道他们到底想要什么！
blow hot and cold: 犹豫不决