perplexed GRE

I am perplexed to know what to do.

我不道怎么做才好。

He perplexed me with this problem.

他用这个问题难住了我。

He was still more perplexed, for this inconsequent smile made nothing clear.

他依然更加感到惑，因为这突如其来的一笑，使他感到莫名其妙。

The professor is never at a nonplus, and never perplexed by a problem.

位教授从来不会感到惑，也不会被任何问题所难倒。

The farmer felt the cow,went away,returned,sorely perplexed,always afraid of being cheated.

农民摸摸,走了又回来,犹豫不决,总怕上当受骗。

Gary looked rather perplexed.

加里看起来相当惑。