bore的形容詞形式是什么?

　　The town is boring and characterless.

　　這個(gè)鎮(zhèn)乏味且毫無特色。

　　Many diets fail because they are boring.

　　許多規(guī)定飲食因單調(diào)乏味都不奏效。

　　A few jokes add leaven to a boring speech.

　　幾句笑話可給枯燥無味的演講增添活躍的氣氛。