How to pronounce several consecutive '“三声” characters?
I thought about such questions before as well, it turns out in this case, you would just pronounce the way it flows better for you, for example

qíng nǐ géi lǐ xué zhǔ jiáng jiǎng yóng gǎn dē dá sǐ láo hú zhě
qǐng ní gěi (pause) lǐ xué zhǔ jiáng jiǎng yóng gǎn dē dá sǐ láo hú zhě

You can imagine you are trying to speak out a number whose value is

3.55555555555555555555555...

You would naturally alternate second and third tone.