The students arrive at the factory at 8.00 a.m. The Assistant Manager takes them around the factory. ( change to the simple past tense)
The students arrived at the factory at 8.00 a.m. The Assistant Manager took them around the factory.
In order to change the sentence into a simple past, firstly we need to change the verb.
Hence the past tense of the verb Arrive is Arrived
And past tense of the verb takes is Took