这部电影太无聊了，我看到一半就睡着了。

The movie was so ___dull that I fell asleep halfway through.

这把剪刀太钝了，连纸都剪不动。

These scissors are too ___dull to even cut paper.

这个学生反应有点迟钝，需要更多时间理解问题。

The student seems a bit ___dull and needs more time to understand the question.

阴天的灰色让风景显得特别暗淡。

The gray sky made the scenery look especially ___dull.