Questions too difficult

Evidently some of these questions are rather too difficult to answer.

显然，其中有些问题稍有点难以回答。

The software also alerts them if difficult questions are being answered suspiciously quickly, or if two test-takers' answers match too closely for comfort.

如果有人回答很困难的问题时速度快得让人怀疑或者有两个考生的答案过于相似显得不自然时，软件就会提醒考官有情况。

And the software also alerts them if difficult questions are being answered suspiciously quickly, or if two test-takers' answers match too closely for comfort.

而如果解答难题的速度快得令人生疑，或者两个考生的答案异乎寻常地相近，软件也会警告考生。