We must avoid making mistakes in our work.
A. 我们必须避免在工作中犯错误。
B. 我们必须避免在工作中犯不必要的错误。
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Had we enough time, things would be easy.
A. 要是我们有足够的时间,事情就好办了。
B. 我们有足够的时间,事情就容易了。
If true, this will cause us a lot of trouble.
A. 情况要是属实,这将给我们带来很多麻烦。
B. 如果是真的,这将给我们造成很多麻烦。
You can't buy things without money.没钱。
They felt worried when they realized that they had got on the wrong train.,他们开始担 心起来。