Suppose you drop a clock toward a black hole. as you look at the clock from a high orbit, what will you notice?

The clock will begin to go in slowly as it turns red and dissapears into the black hole however it would come a time when it would seem like the clock has stopped completely.  

ń, wǒ shuō yīngyǔ, dàn wǒ huì shuō qítā yǔyán, rú xībānyá yǔ fǎyǔ yìdàlì yǔ hé pǔtōnghuà, suǒyǐ bùyào pànduàn, dànshì