1)
Why did Mosheh need to repeat what the people said they saw and heard?
1.
-d came to give the Torah, Yisrael made two requests: 1. to see His Kavod and 2. to hear His Voice. 1 . Now that Hashem had fulfilled their requests, they asked Moshe to take over and to act as the intermediary between them and Hashem.
1
See Oznayim la'Torah, who elaborates.
2)
?Hein Her?anu Hashem Elokeinu es Kevodo?. What are the connotation of ?Kevodo?, ?Gadlo?, and ?Kolo??
1.
R. Bachye: ?Kevodo? refers to the appearance of fire, ?Gadlo?, to the lightning, the voices and the ssond of the Shofar, and and ?Kolo?, to the Aseres ha?Dibros.


