The persistence of a cough in his daughter puzzled him.

女儿持续的咳嗽难。

The examination question baffled me completely and I couldn't answer it.

考试完全我难，我答不上来。

She gulped nervously, as if the question bothered her.

紧张地咽一下, 似乎那问难。

I got bogged down by the difficult homework.

课外作业我给难。

I'm doing the crossword and I've got stuck.

我正在做填字游戏但是被难。

He embarrassed me with a difficult question.

出一道难我难。

Hecklers in the crowd asked irrelevant questions for the sole purpose of vexing the speaker.

人群中的发问者们问些不相干的问，只是为难发言人。

This thorny problem on the environmental protection floored the new mayor.

这个关于环境保护的棘手难新任市长难。

He perplexed me with this problem.

用这个问难我。

The question cornered me.

那个问我难。

The question foxed me completely.

问完全我难。