I am so exhausted, but I can finally take a break. :)
421. This book bores me.(oo is slightly off. should it be borez?)
422. Do you find this class boring?
423. This movie isn’t very interesting.
424. I’m not interested in this conversation.
425. Holidays with my relatives tend to be boring.
426. He looks pretty bored right now.
427. Am I boring you?
428. No one expected the play to be this boring.
429. Why do you think this is dull? (This is a hard one to pronunce. Your tonge should relax for u, but you tough can't relax for l. That's why this is a hard one. In term of rhythm, I think u can be a little longer.)
430. This cannot get anymore dull.
431. This kind of weather is very depressing.(When you do the linking, of can be treated as a schwa. that means you can read kind of as "kinda")
432. I was bored out of my mind.(ou is off, remember ouch! Once again, try the linking and treat of as a schwa)
433. I just watched a dull movie and called it a night early.(this vowel "a" is kinda off too. Try to open your mouth a little bigger)
434. I’m usually pretty bored.(This should be ee, yours is too close to a "ei")
435. In class, I have nothing to do.