hong

Please help me with this exerciese: fill in the gap with one appropriate preposition :The teacher …… whom I’ve heard so much, gave an extremely interesting lecture. I don't know what should be used? "of" or " about"?

please help me with the question:find a mistake in the following sentence: The labor unions met with the management board all the night in order to avoid a strike. I know the mistake is " all the night". it should be all night. ButI don't know the reason....

she drives 69 miles each way.about how many miles does melissa drive in 52 weekends?