他们这个决定的道德性仍然非常值得怀疑。

The ethics of their decision remain highly ___questionable.

这个新理论能否在实践中得到证实是值得怀疑的。

It is ___questionable whether this new theory can be proven in practice.

这家公司获取如此高额利润的方法在道德上是存疑的。

The company's methods for achieving such high profits are morally ___questionable.